Finding the Third Proportional to 517,729 and 784,612.50

Step by Step Solution

1. Step 1: Write the proportion equation
   517,729 : 784,612.50 = 784,612.50 : x
2. Step 2: Convert to fraction form
   517,729/784,612.50 = 784,612.50/x
3. Step 3: Cross multiply
   517,729x = 784,612.50 × 784,612.50
4. Step 4: Simplify right side
   517,729x = 615,616,775,156.25
5. Step 5: Solve for x
   x = 615,616,775,156.25/517,729
6. Step 6: Final answer
   x = 1,189,071.45