Finding the Third Proportional to 54,706 and 87,040

Step by Step Solution

1. Step 1: Write the proportion equation
   54,706 : 87,040 = 87,040 : x
2. Step 2: Convert to fraction form
   54,706/87,040 = 87,040/x
3. Step 3: Cross multiply
   54,706x = 87,040 × 87,040
4. Step 4: Simplify right side
   54,706x = 7,575,961,600
5. Step 5: Solve for x
   x = 7,575,961,600/54,706
6. Step 6: Final answer
   x = 138,485.02