Finding the Fourth Proportional to 11,275.78, 15,573.42 and 7,684.54

Step by Step Solution

1. Step 1: Write the proportion equation
   11,275.78 : 15,573.42 = 7,684.54 : x
2. Step 2: Convert to fraction form
   11,275.78/15,573.42 = 7,684.54/x
3. Step 3: Cross multiply
   11,275.78x = 15,573.42 × 7,684.54
4. Step 4: Simplify right side
   11,275.78x = 119,674,568.93
5. Step 5: Solve for x
   x = 119,674,568.93/11,275.78
6. Step 6: Final answer
   x = 10,613.42