Finding the Fourth Proportional to 31,143.01, 42,978.36 and 17,713.92

Step by Step Solution

1. Step 1: Write the proportion equation
   31,143.01 : 42,978.36 = 17,713.92 : x
2. Step 2: Convert to fraction form
   31,143.01/42,978.36 = 17,713.92/x
3. Step 3: Cross multiply
   31,143.01x = 42,978.36 × 17,713.92
4. Step 4: Simplify right side
   31,143.01x = 761,315,116.97
5. Step 5: Solve for x
   x = 761,315,116.97/31,143.01
6. Step 6: Final answer
   x = 24,445.78