Finding the Third Proportional to 131,458.50 and 301,234.50

Step by Step Solution

1. Step 1: Write the proportion equation
   131,458.50 : 301,234.50 = 301,234.50 : x
2. Step 2: Convert to fraction form
   131,458.50/301,234.50 = 301,234.50/x
3. Step 3: Cross multiply
   131,458.50x = 301,234.50 × 301,234.50
4. Step 4: Simplify right side
   131,458.50x = 90,742,223,990.25
5. Step 5: Solve for x
   x = 90,742,223,990.25/131,458.50
6. Step 6: Final answer
   x = 690,272.78