Finding the Fourth Proportional to 31,471.76, 43,429.42 and 17,321.88

Step by Step Solution

1. Step 1: Write the proportion equation
   31,471.76 : 43,429.42 = 17,321.88 : x
2. Step 2: Convert to fraction form
   31,471.76/43,429.42 = 17,321.88/x
3. Step 3: Cross multiply
   31,471.76x = 43,429.42 × 17,321.88
4. Step 4: Simplify right side
   31,471.76x = 752,279,201.71
5. Step 5: Solve for x
   x = 752,279,201.71/31,471.76
6. Step 6: Final answer
   x = 23,903.31