Finding the Third Proportional to 299,442 and 649,246.50

Step by Step Solution

1. Step 1: Write the proportion equation
   299,442 : 649,246.50 = 649,246.50 : x
2. Step 2: Convert to fraction form
   299,442/649,246.50 = 649,246.50/x
3. Step 3: Cross multiply
   299,442x = 649,246.50 × 649,246.50
4. Step 4: Simplify right side
   299,442x = 421,521,017,762.25
5. Step 5: Solve for x
   x = 421,521,017,762.25/299,442
6. Step 6: Final answer
   x = 1,407,688.36