Finding the Fourth Proportional to 22,887.92, 31,586.10 and 12,816.78

Step by Step Solution

1. Step 1: Write the proportion equation
   22,887.92 : 31,586.10 = 12,816.78 : x
2. Step 2: Convert to fraction form
   22,887.92/31,586.10 = 12,816.78/x
3. Step 3: Cross multiply
   22,887.92x = 31,586.10 × 12,816.78
4. Step 4: Simplify right side
   22,887.92x = 404,832,094.76
5. Step 5: Solve for x
   x = 404,832,094.76/22,887.92
6. Step 6: Final answer
   x = 17,687.59