Finding the Fourth Proportional to 22,887.87, 31,585.86 and 12,816.30

Step by Step Solution

1. Step 1: Write the proportion equation
   22,887.87 : 31,585.86 = 12,816.30 : x
2. Step 2: Convert to fraction form
   22,887.87/31,585.86 = 12,816.30/x
3. Step 3: Cross multiply
   22,887.87x = 31,585.86 × 12,816.30
4. Step 4: Simplify right side
   22,887.87x = 404,813,857.52
5. Step 5: Solve for x
   x = 404,813,857.52/22,887.87
6. Step 6: Final answer
   x = 17,686.83