Finding the Third Proportional to 15,081.19 and 20,761.31

Step by Step Solution

1. Step 1: Write the proportion equation
   15,081.19 : 20,761.31 = 20,761.31 : x
2. Step 2: Convert to fraction form
   15,081.19/20,761.31 = 20,761.31/x
3. Step 3: Cross multiply
   15,081.19x = 20,761.31 × 20,761.31
4. Step 4: Simplify right side
   15,081.19x = 431,032,096.72
5. Step 5: Solve for x
   x = 431,032,096.72/15,081.19
6. Step 6: Final answer
   x = 28,580.78