Finding the Third Proportional to 40,290.75 and 76,618.13

Step by Step Solution

1. Step 1: Write the proportion equation
   40,290.75 : 76,618.13 = 76,618.13 : x
2. Step 2: Convert to fraction form
   40,290.75/76,618.13 = 76,618.13/x
3. Step 3: Cross multiply
   40,290.75x = 76,618.13 × 76,618.13
4. Step 4: Simplify right side
   40,290.75x = 5,870,337,078.52
5. Step 5: Solve for x
   x = 5,870,337,078.52/40,290.75
6. Step 6: Final answer
   x = 145,699.37