Finding the Fourth Proportional to 22,498.77, 31,061.58 and 15,435.57

Step by Step Solution

1. Step 1: Write the proportion equation
   22,498.77 : 31,061.58 = 15,435.57 : x
2. Step 2: Convert to fraction form
   22,498.77/31,061.58 = 15,435.57/x
3. Step 3: Cross multiply
   22,498.77x = 31,061.58 × 15,435.57
4. Step 4: Simplify right side
   22,498.77x = 479,453,192.40
5. Step 5: Solve for x
   x = 479,453,192.40/22,498.77
6. Step 6: Final answer
   x = 21,310.20