Finding the Third Proportional to 346,320 and 518,086.50

Step by Step Solution

1. Step 1: Write the proportion equation
   346,320 : 518,086.50 = 518,086.50 : x
2. Step 2: Convert to fraction form
   346,320/518,086.50 = 518,086.50/x
3. Step 3: Cross multiply
   346,320x = 518,086.50 × 518,086.50
4. Step 4: Simplify right side
   346,320x = 268,413,621,482.25
5. Step 5: Solve for x
   x = 268,413,621,482.25/346,320
6. Step 6: Final answer
   x = 775,045.11