Finding the Third Proportional to 39,760.88 and 54,720.56

Step by Step Solution

1. Step 1: Write the proportion equation
   39,760.88 : 54,720.56 = 54,720.56 : x
2. Step 2: Convert to fraction form
   39,760.88/54,720.56 = 54,720.56/x
3. Step 3: Cross multiply
   39,760.88x = 54,720.56 × 54,720.56
4. Step 4: Simplify right side
   39,760.88x = 2,994,339,960.32
5. Step 5: Solve for x
   x = 2,994,339,960.32/39,760.88
6. Step 6: Final answer
   x = 75,308.70