Finding the Third Proportional to 145,557 and 318,181.50

Step by Step Solution

1. Step 1: Write the proportion equation
   145,557 : 318,181.50 = 318,181.50 : x
2. Step 2: Convert to fraction form
   145,557/318,181.50 = 318,181.50/x
3. Step 3: Cross multiply
   145,557x = 318,181.50 × 318,181.50
4. Step 4: Simplify right side
   145,557x = 101,239,466,942.25
5. Step 5: Solve for x
   x = 101,239,466,942.25/145,557
6. Step 6: Final answer
   x = 695,531.42