Finding the Third Proportional to 66,915.56 and 91,756.69

Step by Step Solution

1. Step 1: Write the proportion equation
   66,915.56 : 91,756.69 = 91,756.69 : x
2. Step 2: Convert to fraction form
   66,915.56/91,756.69 = 91,756.69/x
3. Step 3: Cross multiply
   66,915.56x = 91,756.69 × 91,756.69
4. Step 4: Simplify right side
   66,915.56x = 8,419,289,700.97
5. Step 5: Solve for x
   x = 8,419,289,700.97/66,915.56
6. Step 6: Final answer
   x = 125,819.61