Finding the Fourth Proportional to 22,636.50, 31,238.61 and 12,700.50

Step by Step Solution

1. Step 1: Write the proportion equation
   22,636.50 : 31,238.61 = 12,700.50 : x
2. Step 2: Convert to fraction form
   22,636.50/31,238.61 = 12,700.50/x
3. Step 3: Cross multiply
   22,636.50x = 31,238.61 × 12,700.50
4. Step 4: Simplify right side
   22,636.50x = 396,745,966.31
5. Step 5: Solve for x
   x = 396,745,966.31/22,636.50
6. Step 6: Final answer
   x = 17,526.82