Finding the Third Proportional to 302,718 and 648,901.50

Step by Step Solution

1. Step 1: Write the proportion equation
   302,718 : 648,901.50 = 648,901.50 : x
2. Step 2: Convert to fraction form
   302,718/648,901.50 = 648,901.50/x
3. Step 3: Cross multiply
   302,718x = 648,901.50 × 648,901.50
4. Step 4: Simplify right side
   302,718x = 421,073,156,702.25
5. Step 5: Solve for x
   x = 421,073,156,702.25/302,718
6. Step 6: Final answer
   x = 1,390,974.96