Finding the Fourth Proportional to 23,210.52, 32,031.25 and 13,138.77

Step by Step Solution

1. Step 1: Write the proportion equation
   23,210.52 : 32,031.25 = 13,138.77 : x
2. Step 2: Convert to fraction form
   23,210.52/32,031.25 = 13,138.77/x
3. Step 3: Cross multiply
   23,210.52x = 32,031.25 × 13,138.77
4. Step 4: Simplify right side
   23,210.52x = 420,851,313.83
5. Step 5: Solve for x
   x = 420,851,313.83/23,210.52
6. Step 6: Final answer
   x = 18,131.92