Finding the Fourth Proportional to 31,689.91, 47,581.59 and 17,677.31

Step by Step Solution

1. Step 1: Write the proportion equation
   31,689.91 : 47,581.59 = 17,677.31 : x
2. Step 2: Convert to fraction form
   31,689.91/47,581.59 = 17,677.31/x
3. Step 3: Cross multiply
   31,689.91x = 47,581.59 × 17,677.31
4. Step 4: Simplify right side
   31,689.91x = 841,114,516.72
5. Step 5: Solve for x
   x = 841,114,516.72/31,689.91
6. Step 6: Final answer
   x = 26,542.03