Finding the Fourth Proportional to 31,108.84, 42,930.14 and 17,680.12

Step by Step Solution

1. Step 1: Write the proportion equation
   31,108.84 : 42,930.14 = 17,680.12 : x
2. Step 2: Convert to fraction form
   31,108.84/42,930.14 = 17,680.12/x
3. Step 3: Cross multiply
   31,108.84x = 42,930.14 × 17,680.12
4. Step 4: Simplify right side
   31,108.84x = 759,010,026.82
5. Step 5: Solve for x
   x = 759,010,026.82/31,108.84
6. Step 6: Final answer
   x = 24,398.53