Finding the Third Proportional to 297,904.50 and 638,442

Step by Step Solution

1. Step 1: Write the proportion equation
   297,904.50 : 638,442 = 638,442 : x
2. Step 2: Convert to fraction form
   297,904.50/638,442 = 638,442/x
3. Step 3: Cross multiply
   297,904.50x = 638,442 × 638,442
4. Step 4: Simplify right side
   297,904.50x = 407,608,187,364
5. Step 5: Solve for x
   x = 407,608,187,364/297,904.50
6. Step 6: Final answer
   x = 1,368,251.19