Finding the Fourth Proportional to 31,978.17, 47,951.27 and 18,655.74

Step by Step Solution

1. Step 1: Write the proportion equation
   31,978.17 : 47,951.27 = 18,655.74 : x
2. Step 2: Convert to fraction form
   31,978.17/47,951.27 = 18,655.74/x
3. Step 3: Cross multiply
   31,978.17x = 47,951.27 × 18,655.74
4. Step 4: Simplify right side
   31,978.17x = 894,566,472.43
5. Step 5: Solve for x
   x = 894,566,472.43/31,978.17
6. Step 6: Final answer
   x = 27,974.29