Finding the Fourth Proportional to 76,839.76, 106,025.25 and 42,845.55

Step by Step Solution

1. Step 1: Write the proportion equation
   76,839.76 : 106,025.25 = 42,845.55 : x
2. Step 2: Convert to fraction form
   76,839.76/106,025.25 = 42,845.55/x
3. Step 3: Cross multiply
   76,839.76x = 106,025.25 × 42,845.55
4. Step 4: Simplify right side
   76,839.76x = 4,542,710,150.14
5. Step 5: Solve for x
   x = 4,542,710,150.14/76,839.76
6. Step 6: Final answer
   x = 59,119.27