Finding the Third Proportional to 346,484 and 518,313.50

Step by Step Solution

1. Step 1: Write the proportion equation
   346,484 : 518,313.50 = 518,313.50 : x
2. Step 2: Convert to fraction form
   346,484/518,313.50 = 518,313.50/x
3. Step 3: Cross multiply
   346,484x = 518,313.50 × 518,313.50
4. Step 4: Simplify right side
   346,484x = 268,648,884,282.25
5. Step 5: Solve for x
   x = 268,648,884,282.25/346,484
6. Step 6: Final answer
   x = 775,357.26