Finding the Third Proportional to 66,916.50 and 91,759.75

Step by Step Solution

1. Step 1: Write the proportion equation
   66,916.50 : 91,759.75 = 91,759.75 : x
2. Step 2: Convert to fraction form
   66,916.50/91,759.75 = 91,759.75/x
3. Step 3: Cross multiply
   66,916.50x = 91,759.75 × 91,759.75
4. Step 4: Simplify right side
   66,916.50x = 8,419,851,720.06
5. Step 5: Solve for x
   x = 8,419,851,720.06/66,916.50
6. Step 6: Final answer
   x = 125,826.24