Finding the Third Proportional to 59,609.25 and 90,021.75

Step by Step Solution

1. Step 1: Write the proportion equation
   59,609.25 : 90,021.75 = 90,021.75 : x
2. Step 2: Convert to fraction form
   59,609.25/90,021.75 = 90,021.75/x
3. Step 3: Cross multiply
   59,609.25x = 90,021.75 × 90,021.75
4. Step 4: Simplify right side
   59,609.25x = 8,103,915,473.06
5. Step 5: Solve for x
   x = 8,103,915,473.06/59,609.25
6. Step 6: Final answer
   x = 135,950.64