Finding the Fourth Proportional to 31,723.27, 43,758.29 and 20,407.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,723.27 : 43,758.29 = 20,407.50 : x
2. Step 2: Convert to fraction form
   31,723.27/43,758.29 = 20,407.50/x
3. Step 3: Cross multiply
   31,723.27x = 43,758.29 × 20,407.50
4. Step 4: Simplify right side
   31,723.27x = 892,997,303.18
5. Step 5: Solve for x
   x = 892,997,303.18/31,723.27
6. Step 6: Final answer
   x = 28,149.60