Finding the Third Proportional to 297,540 and 619,146

Step by Step Solution

1. Step 1: Write the proportion equation
   297,540 : 619,146 = 619,146 : x
2. Step 2: Convert to fraction form
   297,540/619,146 = 619,146/x
3. Step 3: Cross multiply
   297,540x = 619,146 × 619,146
4. Step 4: Simplify right side
   297,540x = 383,341,769,316
5. Step 5: Solve for x
   x = 383,341,769,316/297,540
6. Step 6: Final answer
   x = 1,288,370.54