Finding the Fourth Proportional to 9,803.34, 14,690.61 and 7,728.42

Step by Step Solution

1. Step 1: Write the proportion equation
   9,803.34 : 14,690.61 = 7,728.42 : x
2. Step 2: Convert to fraction form
   9,803.34/14,690.61 = 7,728.42/x
3. Step 3: Cross multiply
   9,803.34x = 14,690.61 × 7,728.42
4. Step 4: Simplify right side
   9,803.34x = 113,535,204.14
5. Step 5: Solve for x
   x = 113,535,204.14/9,803.34
6. Step 6: Final answer
   x = 11,581.28