Finding the Third Proportional to 292,881 and 639,463.50

Step by Step Solution

1. Step 1: Write the proportion equation
   292,881 : 639,463.50 = 639,463.50 : x
2. Step 2: Convert to fraction form
   292,881/639,463.50 = 639,463.50/x
3. Step 3: Cross multiply
   292,881x = 639,463.50 × 639,463.50
4. Step 4: Simplify right side
   292,881x = 408,913,567,832.25
5. Step 5: Solve for x
   x = 408,913,567,832.25/292,881
6. Step 6: Final answer
   x = 1,396,176.49