Finding the Fourth Proportional to 9,727.13, 13,423.15 and 7,085.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,727.13 : 13,423.15 = 7,085.72 : x
2. Step 2: Convert to fraction form
   9,727.13/13,423.15 = 7,085.72/x
3. Step 3: Cross multiply
   9,727.13x = 13,423.15 × 7,085.72
4. Step 4: Simplify right side
   9,727.13x = 95,112,724.83
5. Step 5: Solve for x
   x = 95,112,724.83/9,727.13
6. Step 6: Final answer
   x = 9,778.08