Finding the Third Proportional to 615,798 and 980,617.50

Step by Step Solution

1. Step 1: Write the proportion equation
   615,798 : 980,617.50 = 980,617.50 : x
2. Step 2: Convert to fraction form
   615,798/980,617.50 = 980,617.50/x
3. Step 3: Cross multiply
   615,798x = 980,617.50 × 980,617.50
4. Step 4: Simplify right side
   615,798x = 961,610,681,306.25
5. Step 5: Solve for x
   x = 961,610,681,306.25/615,798
6. Step 6: Final answer
   x = 1,561,568.37