Finding the Third Proportional to 272,362.50 and 398,655

Step by Step Solution

1. Step 1: Write the proportion equation
   272,362.50 : 398,655 = 398,655 : x
2. Step 2: Convert to fraction form
   272,362.50/398,655 = 398,655/x
3. Step 3: Cross multiply
   272,362.50x = 398,655 × 398,655
4. Step 4: Simplify right side
   272,362.50x = 158,925,809,025
5. Step 5: Solve for x
   x = 158,925,809,025/272,362.50
6. Step 6: Final answer
   x = 583,508.41