Finding the Third Proportional to 272,164.50 and 423,150

Step by Step Solution

1. Step 1: Write the proportion equation
   272,164.50 : 423,150 = 423,150 : x
2. Step 2: Convert to fraction form
   272,164.50/423,150 = 423,150/x
3. Step 3: Cross multiply
   272,164.50x = 423,150 × 423,150
4. Step 4: Simplify right side
   272,164.50x = 179,055,922,500
5. Step 5: Solve for x
   x = 179,055,922,500/272,164.50
6. Step 6: Final answer
   x = 657,895.95