Finding the Third Proportional to 55,488 and 85,280

Step by Step Solution

1. Step 1: Write the proportion equation
   55,488 : 85,280 = 85,280 : x
2. Step 2: Convert to fraction form
   55,488/85,280 = 85,280/x
3. Step 3: Cross multiply
   55,488x = 85,280 × 85,280
4. Step 4: Simplify right side
   55,488x = 7,272,678,400
5. Step 5: Solve for x
   x = 7,272,678,400/55,488
6. Step 6: Final answer
   x = 131,067.59