Finding the Fourth Proportional to 31,100.09, 42,915.98 and 17,490.17

Step by Step Solution

1. Step 1: Write the proportion equation
   31,100.09 : 42,915.98 = 17,490.17 : x
2. Step 2: Convert to fraction form
   31,100.09/42,915.98 = 17,490.17/x
3. Step 3: Cross multiply
   31,100.09x = 42,915.98 × 17,490.17
4. Step 4: Simplify right side
   31,100.09x = 750,607,936.93
5. Step 5: Solve for x
   x = 750,607,936.93/31,100.09
6. Step 6: Final answer
   x = 24,135.23