Finding the Third Proportional to 291,939 and 443,391.50

Step by Step Solution

1. Step 1: Write the proportion equation
   291,939 : 443,391.50 = 443,391.50 : x
2. Step 2: Convert to fraction form
   291,939/443,391.50 = 443,391.50/x
3. Step 3: Cross multiply
   291,939x = 443,391.50 × 443,391.50
4. Step 4: Simplify right side
   291,939x = 196,596,022,272.25
5. Step 5: Solve for x
   x = 196,596,022,272.25/291,939
6. Step 6: Final answer
   x = 673,414.73