Finding the Fourth Proportional to 22,563.06, 31,136.01 and 12,490.79

Step by Step Solution

1. Step 1: Write the proportion equation
   22,563.06 : 31,136.01 = 12,490.79 : x
2. Step 2: Convert to fraction form
   22,563.06/31,136.01 = 12,490.79/x
3. Step 3: Cross multiply
   22,563.06x = 31,136.01 × 12,490.79
4. Step 4: Simplify right side
   22,563.06x = 388,913,362.35
5. Step 5: Solve for x
   x = 388,913,362.35/22,563.06
6. Step 6: Final answer
   x = 17,236.73