Finding the Third Proportional to 39,918 and 55,502.25

Step by Step Solution

1. Step 1: Write the proportion equation
   39,918 : 55,502.25 = 55,502.25 : x
2. Step 2: Convert to fraction form
   39,918/55,502.25 = 55,502.25/x
3. Step 3: Cross multiply
   39,918x = 55,502.25 × 55,502.25
4. Step 4: Simplify right side
   39,918x = 3,080,499,755.06
5. Step 5: Solve for x
   x = 3,080,499,755.06/39,918
6. Step 6: Final answer
   x = 77,170.69