Finding the Fourth Proportional to 42,085.71, 63,130.74 and 39,957.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,085.71 : 63,130.74 = 39,957.50 : x
2. Step 2: Convert to fraction form
   42,085.71/63,130.74 = 39,957.50/x
3. Step 3: Cross multiply
   42,085.71x = 63,130.74 × 39,957.50
4. Step 4: Simplify right side
   42,085.71x = 2,522,546,227.90
5. Step 5: Solve for x
   x = 2,522,546,227.90/42,085.71
6. Step 6: Final answer
   x = 59,938.31