Finding the Third Proportional to 57,816 and 87,180

Step by Step Solution

1. Step 1: Write the proportion equation
   57,816 : 87,180 = 87,180 : x
2. Step 2: Convert to fraction form
   57,816/87,180 = 87,180/x
3. Step 3: Cross multiply
   57,816x = 87,180 × 87,180
4. Step 4: Simplify right side
   57,816x = 7,600,352,400
5. Step 5: Solve for x
   x = 7,600,352,400/57,816
6. Step 6: Final answer
   x = 131,457.60