Finding the Fourth Proportional to 22,736.57, 31,381.31 and 15,280.25

Step by Step Solution

1. Step 1: Write the proportion equation
   22,736.57 : 31,381.31 = 15,280.25 : x
2. Step 2: Convert to fraction form
   22,736.57/31,381.31 = 15,280.25/x
3. Step 3: Cross multiply
   22,736.57x = 31,381.31 × 15,280.25
4. Step 4: Simplify right side
   22,736.57x = 479,514,185.73
5. Step 5: Solve for x
   x = 479,514,185.73/22,736.57
6. Step 6: Final answer
   x = 21,090.00