Finding the Fourth Proportional to 83,915.92, 125,785.72 and 42,275.60

Step by Step Solution

1. Step 1: Write the proportion equation
   83,915.92 : 125,785.72 = 42,275.60 : x
2. Step 2: Convert to fraction form
   83,915.92/125,785.72 = 42,275.60/x
3. Step 3: Cross multiply
   83,915.92x = 125,785.72 × 42,275.60
4. Step 4: Simplify right side
   83,915.92x = 5,317,666,784.43
5. Step 5: Solve for x
   x = 5,317,666,784.43/83,915.92
6. Step 6: Final answer
   x = 63,368.99