Finding the Third Proportional to 365,783.50 and 485,480

Step by Step Solution

1. Step 1: Write the proportion equation
   365,783.50 : 485,480 = 485,480 : x
2. Step 2: Convert to fraction form
   365,783.50/485,480 = 485,480/x
3. Step 3: Cross multiply
   365,783.50x = 485,480 × 485,480
4. Step 4: Simplify right side
   365,783.50x = 235,690,830,400
5. Step 5: Solve for x
   x = 235,690,830,400/365,783.50
6. Step 6: Final answer
   x = 644,345.17