Finding the Fourth Proportional to 31,062.60, 42,866.88 and 16,915.43

Step by Step Solution

1. Step 1: Write the proportion equation
   31,062.60 : 42,866.88 = 16,915.43 : x
2. Step 2: Convert to fraction form
   31,062.60/42,866.88 = 16,915.43/x
3. Step 3: Cross multiply
   31,062.60x = 42,866.88 × 16,915.43
4. Step 4: Simplify right side
   31,062.60x = 725,111,751.69
5. Step 5: Solve for x
   x = 725,111,751.69/31,062.60
6. Step 6: Final answer
   x = 23,343.56