Finding the Third Proportional to 42,480 and 63,872

Step by Step Solution

1. Step 1: Write the proportion equation
   42,480 : 63,872 = 63,872 : x
2. Step 2: Convert to fraction form
   42,480/63,872 = 63,872/x
3. Step 3: Cross multiply
   42,480x = 63,872 × 63,872
4. Step 4: Simplify right side
   42,480x = 4,079,632,384
5. Step 5: Solve for x
   x = 4,079,632,384/42,480
6. Step 6: Final answer
   x = 96,036.54