Finding the Third Proportional to 240,209.50 and 556,025.50

Step by Step Solution

1. Step 1: Write the proportion equation
   240,209.50 : 556,025.50 = 556,025.50 : x
2. Step 2: Convert to fraction form
   240,209.50/556,025.50 = 556,025.50/x
3. Step 3: Cross multiply
   240,209.50x = 556,025.50 × 556,025.50
4. Step 4: Simplify right side
   240,209.50x = 309,164,356,650.25
5. Step 5: Solve for x
   x = 309,164,356,650.25/240,209.50
6. Step 6: Final answer
   x = 1,287,061.32