Finding the Third Proportional to 61,405.88 and 91,728.56

Step by Step Solution

1. Step 1: Write the proportion equation
   61,405.88 : 91,728.56 = 91,728.56 : x
2. Step 2: Convert to fraction form
   61,405.88/91,728.56 = 91,728.56/x
3. Step 3: Cross multiply
   61,405.88x = 91,728.56 × 91,728.56
4. Step 4: Simplify right side
   61,405.88x = 8,414,129,178.32
5. Step 5: Solve for x
   x = 8,414,129,178.32/61,405.88
6. Step 6: Final answer
   x = 137,024.82