Finding the Third Proportional to 517,386 and 772,891.50

Step by Step Solution

1. Step 1: Write the proportion equation
   517,386 : 772,891.50 = 772,891.50 : x
2. Step 2: Convert to fraction form
   517,386/772,891.50 = 772,891.50/x
3. Step 3: Cross multiply
   517,386x = 772,891.50 × 772,891.50
4. Step 4: Simplify right side
   517,386x = 597,361,270,772.25
5. Step 5: Solve for x
   x = 597,361,270,772.25/517,386
6. Step 6: Final answer
   x = 1,154,575.64