Finding the Fourth Proportional to 76,909.10, 106,134.38 and 42,915.50

Step by Step Solution

1. Step 1: Write the proportion equation
   76,909.10 : 106,134.38 = 42,915.50 : x
2. Step 2: Convert to fraction form
   76,909.10/106,134.38 = 42,915.50/x
3. Step 3: Cross multiply
   76,909.10x = 106,134.38 × 42,915.50
4. Step 4: Simplify right side
   76,909.10x = 4,554,809,984.89
5. Step 5: Solve for x
   x = 4,554,809,984.89/76,909.10
6. Step 6: Final answer
   x = 59,223.29