Finding the Third Proportional to 155,242.83 and 320,395.50

Step by Step Solution

1. Step 1: Write the proportion equation
   155,242.83 : 320,395.50 = 320,395.50 : x
2. Step 2: Convert to fraction form
   155,242.83/320,395.50 = 320,395.50/x
3. Step 3: Cross multiply
   155,242.83x = 320,395.50 × 320,395.50
4. Step 4: Simplify right side
   155,242.83x = 102,653,276,420.25
5. Step 5: Solve for x
   x = 102,653,276,420.25/155,242.83
6. Step 6: Final answer
   x = 661,243.28