Finding the Third Proportional to 39,690.38 and 54,675.56

Step by Step Solution

1. Step 1: Write the proportion equation
   39,690.38 : 54,675.56 = 54,675.56 : x
2. Step 2: Convert to fraction form
   39,690.38/54,675.56 = 54,675.56/x
3. Step 3: Cross multiply
   39,690.38x = 54,675.56 × 54,675.56
4. Step 4: Simplify right side
   39,690.38x = 2,989,417,134.69
5. Step 5: Solve for x
   x = 2,989,417,134.69/39,690.38
6. Step 6: Final answer
   x = 75,318.44