Finding the Third Proportional to 147,118.50 and 317,565

Step by Step Solution

1. Step 1: Write the proportion equation
   147,118.50 : 317,565 = 317,565 : x
2. Step 2: Convert to fraction form
   147,118.50/317,565 = 317,565/x
3. Step 3: Cross multiply
   147,118.50x = 317,565 × 317,565
4. Step 4: Simplify right side
   147,118.50x = 100,847,529,225
5. Step 5: Solve for x
   x = 100,847,529,225/147,118.50
6. Step 6: Final answer
   x = 685,485.03