Finding the Fourth Proportional to 9,605.91, 13,255.75 and 7,087.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,605.91 : 13,255.75 = 7,087.12 : x
2. Step 2: Convert to fraction form
   9,605.91/13,255.75 = 7,087.12/x
3. Step 3: Cross multiply
   9,605.91x = 13,255.75 × 7,087.12
4. Step 4: Simplify right side
   9,605.91x = 93,945,066.66
5. Step 5: Solve for x
   x = 93,945,066.66/9,605.91
6. Step 6: Final answer
   x = 9,779.92