Finding the Third Proportional to 131,550 and 289,342.50

Step by Step Solution

1. Step 1: Write the proportion equation
   131,550 : 289,342.50 = 289,342.50 : x
2. Step 2: Convert to fraction form
   131,550/289,342.50 = 289,342.50/x
3. Step 3: Cross multiply
   131,550x = 289,342.50 × 289,342.50
4. Step 4: Simplify right side
   131,550x = 83,719,082,306.25
5. Step 5: Solve for x
   x = 83,719,082,306.25/131,550
6. Step 6: Final answer
   x = 636,405.03