Finding the Fourth Proportional to 22,800.87, 31,462.38 and 12,729.87

Step by Step Solution

1. Step 1: Write the proportion equation
   22,800.87 : 31,462.38 = 12,729.87 : x
2. Step 2: Convert to fraction form
   22,800.87/31,462.38 = 12,729.87/x
3. Step 3: Cross multiply
   22,800.87x = 31,462.38 × 12,729.87
4. Step 4: Simplify right side
   22,800.87x = 400,512,007.29
5. Step 5: Solve for x
   x = 400,512,007.29/22,800.87
6. Step 6: Final answer
   x = 17,565.65