Finding the Third Proportional to 39,451 and 55,490

Step by Step Solution

1. Step 1: Write the proportion equation
   39,451 : 55,490 = 55,490 : x
2. Step 2: Convert to fraction form
   39,451/55,490 = 55,490/x
3. Step 3: Cross multiply
   39,451x = 55,490 × 55,490
4. Step 4: Simplify right side
   39,451x = 3,079,140,100
5. Step 5: Solve for x
   x = 3,079,140,100/39,451
6. Step 6: Final answer
   x = 78,049.74