Finding the Third Proportional to 299,478 and 649,484.50

Step by Step Solution

1. Step 1: Write the proportion equation
   299,478 : 649,484.50 = 649,484.50 : x
2. Step 2: Convert to fraction form
   299,478/649,484.50 = 649,484.50/x
3. Step 3: Cross multiply
   299,478x = 649,484.50 × 649,484.50
4. Step 4: Simplify right side
   299,478x = 421,830,115,740.25
5. Step 5: Solve for x
   x = 421,830,115,740.25/299,478
6. Step 6: Final answer
   x = 1,408,551.27