Finding the Fourth Proportional to 22,490.73, 31,039.95 and 13,059.30

Step by Step Solution

1. Step 1: Write the proportion equation
   22,490.73 : 31,039.95 = 13,059.30 : x
2. Step 2: Convert to fraction form
   22,490.73/31,039.95 = 13,059.30/x
3. Step 3: Cross multiply
   22,490.73x = 31,039.95 × 13,059.30
4. Step 4: Simplify right side
   22,490.73x = 405,360,019.04
5. Step 5: Solve for x
   x = 405,360,019.04/22,490.73
6. Step 6: Final answer
   x = 18,023.43