Finding the Third Proportional to 346,329 and 518,109.50

Step by Step Solution

1. Step 1: Write the proportion equation
   346,329 : 518,109.50 = 518,109.50 : x
2. Step 2: Convert to fraction form
   346,329/518,109.50 = 518,109.50/x
3. Step 3: Cross multiply
   346,329x = 518,109.50 × 518,109.50
4. Step 4: Simplify right side
   346,329x = 268,437,453,990.25
5. Step 5: Solve for x
   x = 268,437,453,990.25/346,329
6. Step 6: Final answer
   x = 775,093.78