Finding the Fourth Proportional to 9,405.59, 12,950.16 and 7,986.29

Step by Step Solution

1. Step 1: Write the proportion equation
   9,405.59 : 12,950.16 = 7,986.29 : x
2. Step 2: Convert to fraction form
   9,405.59/12,950.16 = 7,986.29/x
3. Step 3: Cross multiply
   9,405.59x = 12,950.16 × 7,986.29
4. Step 4: Simplify right side
   9,405.59x = 103,423,733.31
5. Step 5: Solve for x
   x = 103,423,733.31/9,405.59
6. Step 6: Final answer
   x = 10,995.99