Finding the Third Proportional to 302,724 and 648,913.50

Step by Step Solution

1. Step 1: Write the proportion equation
   302,724 : 648,913.50 = 648,913.50 : x
2. Step 2: Convert to fraction form
   302,724/648,913.50 = 648,913.50/x
3. Step 3: Cross multiply
   302,724x = 648,913.50 × 648,913.50
4. Step 4: Simplify right side
   302,724x = 421,088,730,482.25
5. Step 5: Solve for x
   x = 421,088,730,482.25/302,724
6. Step 6: Final answer
   x = 1,390,998.83