Finding the Third Proportional to 57,488 and 85,878

Step by Step Solution

1. Step 1: Write the proportion equation
   57,488 : 85,878 = 85,878 : x
2. Step 2: Convert to fraction form
   57,488/85,878 = 85,878/x
3. Step 3: Cross multiply
   57,488x = 85,878 × 85,878
4. Step 4: Simplify right side
   57,488x = 7,375,030,884
5. Step 5: Solve for x
   x = 7,375,030,884/57,488
6. Step 6: Final answer
   x = 128,288.18