Finding the Fourth Proportional to 31,061.64, 42,865.83 and 16,915.26

Step by Step Solution

1. Step 1: Write the proportion equation
   31,061.64 : 42,865.83 = 16,915.26 : x
2. Step 2: Convert to fraction form
   31,061.64/42,865.83 = 16,915.26/x
3. Step 3: Cross multiply
   31,061.64x = 42,865.83 × 16,915.26
4. Step 4: Simplify right side
   31,061.64x = 725,086,659.57
5. Step 5: Solve for x
   x = 725,086,659.57/31,061.64
6. Step 6: Final answer
   x = 23,343.48