Finding the Third Proportional to 347,455 and 518,145.50

Step by Step Solution

1. Step 1: Write the proportion equation
   347,455 : 518,145.50 = 518,145.50 : x
2. Step 2: Convert to fraction form
   347,455/518,145.50 = 518,145.50/x
3. Step 3: Cross multiply
   347,455x = 518,145.50 × 518,145.50
4. Step 4: Simplify right side
   347,455x = 268,474,759,170.25
5. Step 5: Solve for x
   x = 268,474,759,170.25/347,455
6. Step 6: Final answer
   x = 772,689.30