Finding the Third Proportional to 11,242.13 and 15,280.31

Step by Step Solution

1. Step 1: Write the proportion equation
   11,242.13 : 15,280.31 = 15,280.31 : x
2. Step 2: Convert to fraction form
   11,242.13/15,280.31 = 15,280.31/x
3. Step 3: Cross multiply
   11,242.13x = 15,280.31 × 15,280.31
4. Step 4: Simplify right side
   11,242.13x = 233,487,950.10
5. Step 5: Solve for x
   x = 233,487,950.10/11,242.13
6. Step 6: Final answer
   x = 20,769.02