Finding the Third Proportional to 328,081.50 and 513,990

Step by Step Solution

1. Step 1: Write the proportion equation
   328,081.50 : 513,990 = 513,990 : x
2. Step 2: Convert to fraction form
   328,081.50/513,990 = 513,990/x
3. Step 3: Cross multiply
   328,081.50x = 513,990 × 513,990
4. Step 4: Simplify right side
   328,081.50x = 264,185,720,100
5. Step 5: Solve for x
   x = 264,185,720,100/328,081.50
6. Step 6: Final answer
   x = 805,244.19