Finding the Third Proportional to 66,899.75 and 91,735.50

Step by Step Solution

1. Step 1: Write the proportion equation
   66,899.75 : 91,735.50 = 91,735.50 : x
2. Step 2: Convert to fraction form
   66,899.75/91,735.50 = 91,735.50/x
3. Step 3: Cross multiply
   66,899.75x = 91,735.50 × 91,735.50
4. Step 4: Simplify right side
   66,899.75x = 8,415,401,960.25
5. Step 5: Solve for x
   x = 8,415,401,960.25/66,899.75
6. Step 6: Final answer
   x = 125,791.23