Finding the Third Proportional to 81,672.89 and 123,740.47

Step by Step Solution

1. Step 1: Write the proportion equation
   81,672.89 : 123,740.47 = 123,740.47 : x
2. Step 2: Convert to fraction form
   81,672.89/123,740.47 = 123,740.47/x
3. Step 3: Cross multiply
   81,672.89x = 123,740.47 × 123,740.47
4. Step 4: Simplify right side
   81,672.89x = 15,311,704,573.19
5. Step 5: Solve for x
   x = 15,311,704,573.19/81,672.89
6. Step 6: Final answer
   x = 187,475.97