Finding the Fourth Proportional to 31,107.25, 42,929.09 and 17,679.07

Step by Step Solution

1. Step 1: Write the proportion equation
   31,107.25 : 42,929.09 = 17,679.07 : x
2. Step 2: Convert to fraction form
   31,107.25/42,929.09 = 17,679.07/x
3. Step 3: Cross multiply
   31,107.25x = 42,929.09 × 17,679.07
4. Step 4: Simplify right side
   31,107.25x = 758,946,387.15
5. Step 5: Solve for x
   x = 758,946,387.15/31,107.25
6. Step 6: Final answer
   x = 24,397.73