Finding the Fourth Proportional to 22,490, 31,036.32 and 12,554

Step by Step Solution

1. Step 1: Write the proportion equation
   22,490 : 31,036.32 = 12,554 : x
2. Step 2: Convert to fraction form
   22,490/31,036.32 = 12,554/x
3. Step 3: Cross multiply
   22,490x = 31,036.32 × 12,554
4. Step 4: Simplify right side
   22,490x = 389,629,961.28
5. Step 5: Solve for x
   x = 389,629,961.28/22,490
6. Step 6: Final answer
   x = 17,324.59