Finding the Third Proportional to 297,597.38 and 642,238.88

Step by Step Solution

1. Step 1: Write the proportion equation
   297,597.38 : 642,238.88 = 642,238.88 : x
2. Step 2: Convert to fraction form
   297,597.38/642,238.88 = 642,238.88/x
3. Step 3: Cross multiply
   297,597.38x = 642,238.88 × 642,238.88
4. Step 4: Simplify right side
   297,597.38x = 412,470,772,561.27
5. Step 5: Solve for x
   x = 412,470,772,561.27/297,597.38
6. Step 6: Final answer
   x = 1,386,002.72