Finding the Third Proportional to 39,406.50 and 54,187.88

Step by Step Solution

1. Step 1: Write the proportion equation
   39,406.50 : 54,187.88 = 54,187.88 : x
2. Step 2: Convert to fraction form
   39,406.50/54,187.88 = 54,187.88/x
3. Step 3: Cross multiply
   39,406.50x = 54,187.88 × 54,187.88
4. Step 4: Simplify right side
   39,406.50x = 2,936,325,797.02
5. Step 5: Solve for x
   x = 2,936,325,797.02/39,406.50
6. Step 6: Final answer
   x = 74,513.74