Finding the Third Proportional to 915,172.50 and 1,391,418

Step by Step Solution

1. Step 1: Write the proportion equation
   915,172.50 : 1,391,418 = 1,391,418 : x
2. Step 2: Convert to fraction form
   915,172.50/1,391,418 = 1,391,418/x
3. Step 3: Cross multiply
   915,172.50x = 1,391,418 × 1,391,418
4. Step 4: Simplify right side
   915,172.50x = 1,936,044,050,724
5. Step 5: Solve for x
   x = 1,936,044,050,724/915,172.50
6. Step 6: Final answer
   x = 2,115,496.31