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Finding the Fourth Proportional to 505,756.86, 697,958.55 and 279,416.94

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Solution

The fourth proportional to 505,756.86, 697,958.55 and 279,416.94 is: 385,603.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,756.86 : 697,958.55 = 279,416.94 : x
  2. Step 2: Convert to fraction form
    505,756.86/697,958.55 = 279,416.94/x
  3. Step 3: Cross multiply
    505,756.86x = 697,958.55 × 279,416.94
  4. Step 4: Simplify right side
    505,756.86x = 195,021,442,287.84
  5. Step 5: Solve for x
    x = 195,021,442,287.84/505,756.86
  6. Step 6: Final answer
    x = 385,603.16

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