Finding the Third Proportional to 145,746.50 and 318,745

Step by Step Solution

1. Step 1: Write the proportion equation
   145,746.50 : 318,745 = 318,745 : x
2. Step 2: Convert to fraction form
   145,746.50/318,745 = 318,745/x
3. Step 3: Cross multiply
   145,746.50x = 318,745 × 318,745
4. Step 4: Simplify right side
   145,746.50x = 101,598,375,025
5. Step 5: Solve for x
   x = 101,598,375,025/145,746.50
6. Step 6: Final answer
   x = 697,089.64