Finding the Third Proportional to 39,240 and 55,900

Step by Step Solution

1. Step 1: Write the proportion equation
   39,240 : 55,900 = 55,900 : x
2. Step 2: Convert to fraction form
   39,240/55,900 = 55,900/x
3. Step 3: Cross multiply
   39,240x = 55,900 × 55,900
4. Step 4: Simplify right side
   39,240x = 3,124,810,000
5. Step 5: Solve for x
   x = 3,124,810,000/39,240
6. Step 6: Final answer
   x = 79,633.28