Finding the Fourth Proportional to 76,980.88, 106,227.55 and 42,986.71

Step by Step Solution

1. Step 1: Write the proportion equation
   76,980.88 : 106,227.55 = 42,986.71 : x
2. Step 2: Convert to fraction form
   76,980.88/106,227.55 = 42,986.71/x
3. Step 3: Cross multiply
   76,980.88x = 106,227.55 × 42,986.71
4. Step 4: Simplify right side
   76,980.88x = 4,566,372,885.86
5. Step 5: Solve for x
   x = 4,566,372,885.86/76,980.88
6. Step 6: Final answer
   x = 59,318.27