Finding the Third Proportional to 147,247.50 and 317,998.50

Step by Step Solution

1. Step 1: Write the proportion equation
   147,247.50 : 317,998.50 = 317,998.50 : x
2. Step 2: Convert to fraction form
   147,247.50/317,998.50 = 317,998.50/x
3. Step 3: Cross multiply
   147,247.50x = 317,998.50 × 317,998.50
4. Step 4: Simplify right side
   147,247.50x = 101,123,046,002.25
5. Step 5: Solve for x
   x = 101,123,046,002.25/147,247.50
6. Step 6: Final answer
   x = 686,755.61