Finding the Third Proportional to 346,329.50 and 518,100.50

Step by Step Solution

1. Step 1: Write the proportion equation
   346,329.50 : 518,100.50 = 518,100.50 : x
2. Step 2: Convert to fraction form
   346,329.50/518,100.50 = 518,100.50/x
3. Step 3: Cross multiply
   346,329.50x = 518,100.50 × 518,100.50
4. Step 4: Simplify right side
   346,329.50x = 268,428,128,100.25
5. Step 5: Solve for x
   x = 268,428,128,100.25/346,329.50
6. Step 6: Final answer
   x = 775,065.73