Finding the Third Proportional to 299,184.50 and 648,215

Step by Step Solution

1. Step 1: Write the proportion equation
   299,184.50 : 648,215 = 648,215 : x
2. Step 2: Convert to fraction form
   299,184.50/648,215 = 648,215/x
3. Step 3: Cross multiply
   299,184.50x = 648,215 × 648,215
4. Step 4: Simplify right side
   299,184.50x = 420,182,686,225
5. Step 5: Solve for x
   x = 420,182,686,225/299,184.50
6. Step 6: Final answer
   x = 1,404,426.65