Finding the Third Proportional to 42,612 and 87,360

Step by Step Solution

1. Step 1: Write the proportion equation
   42,612 : 87,360 = 87,360 : x
2. Step 2: Convert to fraction form
   42,612/87,360 = 87,360/x
3. Step 3: Cross multiply
   42,612x = 87,360 × 87,360
4. Step 4: Simplify right side
   42,612x = 7,631,769,600
5. Step 5: Solve for x
   x = 7,631,769,600/42,612
6. Step 6: Final answer
   x = 179,099.07