Finding the Fourth Proportional to 31,124.82, 42,951.56 and 16,978.17

Step by Step Solution

1. Step 1: Write the proportion equation
   31,124.82 : 42,951.56 = 16,978.17 : x
2. Step 2: Convert to fraction form
   31,124.82/42,951.56 = 16,978.17/x
3. Step 3: Cross multiply
   31,124.82x = 42,951.56 × 16,978.17
4. Step 4: Simplify right side
   31,124.82x = 729,238,802.55
5. Step 5: Solve for x
   x = 729,238,802.55/31,124.82
6. Step 6: Final answer
   x = 23,429.49