Finding the Third Proportional to 291,846 and 639,049.50

Step by Step Solution

1. Step 1: Write the proportion equation
   291,846 : 639,049.50 = 639,049.50 : x
2. Step 2: Convert to fraction form
   291,846/639,049.50 = 639,049.50/x
3. Step 3: Cross multiply
   291,846x = 639,049.50 × 639,049.50
4. Step 4: Simplify right side
   291,846x = 408,384,263,450.25
5. Step 5: Solve for x
   x = 408,384,263,450.25/291,846
6. Step 6: Final answer
   x = 1,399,314.24