Finding the Fourth Proportional to 31,134.38, 43,012.22 and 20,404.71

Step by Step Solution

1. Step 1: Write the proportion equation
   31,134.38 : 43,012.22 = 20,404.71 : x
2. Step 2: Convert to fraction form
   31,134.38/43,012.22 = 20,404.71/x
3. Step 3: Cross multiply
   31,134.38x = 43,012.22 × 20,404.71
4. Step 4: Simplify right side
   31,134.38x = 877,651,773.53
5. Step 5: Solve for x
   x = 877,651,773.53/31,134.38
6. Step 6: Final answer
   x = 28,189.16