Finding the Third Proportional to 346,317 and 518,091.50

Step by Step Solution

1. Step 1: Write the proportion equation
   346,317 : 518,091.50 = 518,091.50 : x
2. Step 2: Convert to fraction form
   346,317/518,091.50 = 518,091.50/x
3. Step 3: Cross multiply
   346,317x = 518,091.50 × 518,091.50
4. Step 4: Simplify right side
   346,317x = 268,418,802,372.25
5. Step 5: Solve for x
   x = 268,418,802,372.25/346,317
6. Step 6: Final answer
   x = 775,066.78