Finding the Third Proportional to 87,338.25 and 187,128

Step by Step Solution

1. Step 1: Write the proportion equation
   87,338.25 : 187,128 = 187,128 : x
2. Step 2: Convert to fraction form
   87,338.25/187,128 = 187,128/x
3. Step 3: Cross multiply
   87,338.25x = 187,128 × 187,128
4. Step 4: Simplify right side
   87,338.25x = 35,016,888,384
5. Step 5: Solve for x
   x = 35,016,888,384/87,338.25
6. Step 6: Final answer
   x = 400,934.17