Finding the Fourth Proportional to 9,128.51, 13,694.18 and 3,863.55

Step by Step Solution

1. Step 1: Write the proportion equation
   9,128.51 : 13,694.18 = 3,863.55 : x
2. Step 2: Convert to fraction form
   9,128.51/13,694.18 = 3,863.55/x
3. Step 3: Cross multiply
   9,128.51x = 13,694.18 × 3,863.55
4. Step 4: Simplify right side
   9,128.51x = 52,908,149.14
5. Step 5: Solve for x
   x = 52,908,149.14/9,128.51
6. Step 6: Final answer
   x = 5,795.92