Finding the Third Proportional to 240,861.50 and 518,719.50

Step by Step Solution

1. Step 1: Write the proportion equation
   240,861.50 : 518,719.50 = 518,719.50 : x
2. Step 2: Convert to fraction form
   240,861.50/518,719.50 = 518,719.50/x
3. Step 3: Cross multiply
   240,861.50x = 518,719.50 × 518,719.50
4. Step 4: Simplify right side
   240,861.50x = 269,069,919,680.25
5. Step 5: Solve for x
   x = 269,069,919,680.25/240,861.50
6. Step 6: Final answer
   x = 1,117,114.69