Finding the Third Proportional to 655,311 and 988,987.50

Step by Step Solution

1. Step 1: Write the proportion equation
   655,311 : 988,987.50 = 988,987.50 : x
2. Step 2: Convert to fraction form
   655,311/988,987.50 = 988,987.50/x
3. Step 3: Cross multiply
   655,311x = 988,987.50 × 988,987.50
4. Step 4: Simplify right side
   655,311x = 978,096,275,156.25
5. Step 5: Solve for x
   x = 978,096,275,156.25/655,311
6. Step 6: Final answer
   x = 1,492,568.07