Finding the Third Proportional to 42,960 and 87,132

Step by Step Solution

1. Step 1: Write the proportion equation
   42,960 : 87,132 = 87,132 : x
2. Step 2: Convert to fraction form
   42,960/87,132 = 87,132/x
3. Step 3: Cross multiply
   42,960x = 87,132 × 87,132
4. Step 4: Simplify right side
   42,960x = 7,591,985,424
5. Step 5: Solve for x
   x = 7,591,985,424/42,960
6. Step 6: Final answer
   x = 176,722.19