Finding the Fourth Proportional to 22,280.31, 30,745.65 and 12,719.82

Step by Step Solution

1. Step 1: Write the proportion equation
   22,280.31 : 30,745.65 = 12,719.82 : x
2. Step 2: Convert to fraction form
   22,280.31/30,745.65 = 12,719.82/x
3. Step 3: Cross multiply
   22,280.31x = 30,745.65 × 12,719.82
4. Step 4: Simplify right side
   22,280.31x = 391,079,133.78
5. Step 5: Solve for x
   x = 391,079,133.78/22,280.31
6. Step 6: Final answer
   x = 17,552.68