Finding the Third Proportional to 326,173.50 and 661,518

Step by Step Solution

1. Step 1: Write the proportion equation
   326,173.50 : 661,518 = 661,518 : x
2. Step 2: Convert to fraction form
   326,173.50/661,518 = 661,518/x
3. Step 3: Cross multiply
   326,173.50x = 661,518 × 661,518
4. Step 4: Simplify right side
   326,173.50x = 437,606,064,324
5. Step 5: Solve for x
   x = 437,606,064,324/326,173.50
6. Step 6: Final answer
   x = 1,341,635.86