Finding the Fourth Proportional to 31,655.21, 43,685.33 and 17,508.15

Step by Step Solution

1. Step 1: Write the proportion equation
   31,655.21 : 43,685.33 = 17,508.15 : x
2. Step 2: Convert to fraction form
   31,655.21/43,685.33 = 17,508.15/x
3. Step 3: Cross multiply
   31,655.21x = 43,685.33 × 17,508.15
4. Step 4: Simplify right side
   31,655.21x = 764,849,222.90
5. Step 5: Solve for x
   x = 764,849,222.90/31,655.21
6. Step 6: Final answer
   x = 24,161.88