Finding the Third Proportional to 147,028.50 and 318,948

Step by Step Solution

1. Step 1: Write the proportion equation
   147,028.50 : 318,948 = 318,948 : x
2. Step 2: Convert to fraction form
   147,028.50/318,948 = 318,948/x
3. Step 3: Cross multiply
   147,028.50x = 318,948 × 318,948
4. Step 4: Simplify right side
   147,028.50x = 101,727,826,704
5. Step 5: Solve for x
   x = 101,727,826,704/147,028.50
6. Step 6: Final answer
   x = 691,891.89