Finding the Fourth Proportional to 22,762.29, 31,408.14 and 12,688.50

Step by Step Solution

1. Step 1: Write the proportion equation
   22,762.29 : 31,408.14 = 12,688.50 : x
2. Step 2: Convert to fraction form
   22,762.29/31,408.14 = 12,688.50/x
3. Step 3: Cross multiply
   22,762.29x = 31,408.14 × 12,688.50
4. Step 4: Simplify right side
   22,762.29x = 398,522,184.39
5. Step 5: Solve for x
   x = 398,522,184.39/22,762.29
6. Step 6: Final answer
   x = 17,508.00