Finding the Third Proportional to 66,963.75 and 90,945.38

Step by Step Solution

1. Step 1: Write the proportion equation
   66,963.75 : 90,945.38 = 90,945.38 : x
2. Step 2: Convert to fraction form
   66,963.75/90,945.38 = 90,945.38/x
3. Step 3: Cross multiply
   66,963.75x = 90,945.38 × 90,945.38
4. Step 4: Simplify right side
   66,963.75x = 8,271,061,233.89
5. Step 5: Solve for x
   x = 8,271,061,233.89/66,963.75
6. Step 6: Final answer
   x = 123,515.50