Finding the Fourth Proportional to 31,108.49, 42,929.73 and 17,679.40

Step by Step Solution

1. Step 1: Write the proportion equation
   31,108.49 : 42,929.73 = 17,679.40 : x
2. Step 2: Convert to fraction form
   31,108.49/42,929.73 = 17,679.40/x
3. Step 3: Cross multiply
   31,108.49x = 42,929.73 × 17,679.40
4. Step 4: Simplify right side
   31,108.49x = 758,971,868.56
5. Step 5: Solve for x
   x = 758,971,868.56/31,108.49
6. Step 6: Final answer
   x = 24,397.58