Finding the Third Proportional to 42,348 and 55,686

Step by Step Solution

1. Step 1: Write the proportion equation
   42,348 : 55,686 = 55,686 : x
2. Step 2: Convert to fraction form
   42,348/55,686 = 55,686/x
3. Step 3: Cross multiply
   42,348x = 55,686 × 55,686
4. Step 4: Simplify right side
   42,348x = 3,100,930,596
5. Step 5: Solve for x
   x = 3,100,930,596/42,348
6. Step 6: Final answer
   x = 73,224.96