Finding the Fourth Proportional to 498,066.96, 683,859.72 and 485,076.72

Step by Step Solution

1. Step 1: Write the proportion equation
   498,066.96 : 683,859.72 = 485,076.72 : x
2. Step 2: Convert to fraction form
   498,066.96/683,859.72 = 485,076.72/x
3. Step 3: Cross multiply
   498,066.96x = 683,859.72 × 485,076.72
4. Step 4: Simplify right side
   498,066.96x = 331,724,429,917.72
5. Step 5: Solve for x
   x = 331,724,429,917.72/498,066.96
6. Step 6: Final answer
   x = 666,023.76