Finding the Fourth Proportional to 31,108.25, 42,930.47 and 17,680.07

Step by Step Solution

1. Step 1: Write the proportion equation
   31,108.25 : 42,930.47 = 17,680.07 : x
2. Step 2: Convert to fraction form
   31,108.25/42,930.47 = 17,680.07/x
3. Step 3: Cross multiply
   31,108.25x = 42,930.47 × 17,680.07
4. Step 4: Simplify right side
   31,108.25x = 759,013,714.73
5. Step 5: Solve for x
   x = 759,013,714.73/31,108.25
6. Step 6: Final answer
   x = 24,399.11