Finding the Fourth Proportional to 31,702.47, 43,749.40 and 17,555.31

Step by Step Solution

1. Step 1: Write the proportion equation
   31,702.47 : 43,749.40 = 17,555.31 : x
2. Step 2: Convert to fraction form
   31,702.47/43,749.40 = 17,555.31/x
3. Step 3: Cross multiply
   31,702.47x = 43,749.40 × 17,555.31
4. Step 4: Simplify right side
   31,702.47x = 768,034,279.31
5. Step 5: Solve for x
   x = 768,034,279.31/31,702.47
6. Step 6: Final answer
   x = 24,226.32