Finding the Fourth Proportional to 22,887.90, 31,586.04 and 12,816.72

Step by Step Solution

1. Step 1: Write the proportion equation
   22,887.90 : 31,586.04 = 12,816.72 : x
2. Step 2: Convert to fraction form
   22,887.90/31,586.04 = 12,816.72/x
3. Step 3: Cross multiply
   22,887.90x = 31,586.04 × 12,816.72
4. Step 4: Simplify right side
   22,887.90x = 404,829,430.59
5. Step 5: Solve for x
   x = 404,829,430.59/22,887.90
6. Step 6: Final answer
   x = 17,687.49