Finding the Third Proportional to 90,578.25 and 130,642.88

Step by Step Solution

1. Step 1: Write the proportion equation
   90,578.25 : 130,642.88 = 130,642.88 : x
2. Step 2: Convert to fraction form
   90,578.25/130,642.88 = 130,642.88/x
3. Step 3: Cross multiply
   90,578.25x = 130,642.88 × 130,642.88
4. Step 4: Simplify right side
   90,578.25x = 17,067,560,788.27
5. Step 5: Solve for x
   x = 17,067,560,788.27/90,578.25
6. Step 6: Final answer
   x = 188,428.91