Finding the Third Proportional to 655,212 and 987,439.50

Step by Step Solution

1. Step 1: Write the proportion equation
   655,212 : 987,439.50 = 987,439.50 : x
2. Step 2: Convert to fraction form
   655,212/987,439.50 = 987,439.50/x
3. Step 3: Cross multiply
   655,212x = 987,439.50 × 987,439.50
4. Step 4: Simplify right side
   655,212x = 975,036,766,160.25
5. Step 5: Solve for x
   x = 975,036,766,160.25/655,212
6. Step 6: Final answer
   x = 1,488,124.10