Finding the Third Proportional to 59,640 and 91,371

Step by Step Solution

1. Step 1: Write the proportion equation
   59,640 : 91,371 = 91,371 : x
2. Step 2: Convert to fraction form
   59,640/91,371 = 91,371/x
3. Step 3: Cross multiply
   59,640x = 91,371 × 91,371
4. Step 4: Simplify right side
   59,640x = 8,348,659,641
5. Step 5: Solve for x
   x = 8,348,659,641/59,640
6. Step 6: Final answer
   x = 139,984.23