Finding the Fourth Proportional to 5,155.36, 7,117.56 and 3,974.16

Step by Step Solution

1. Step 1: Write the proportion equation
   5,155.36 : 7,117.56 = 3,974.16 : x
2. Step 2: Convert to fraction form
   5,155.36/7,117.56 = 3,974.16/x
3. Step 3: Cross multiply
   5,155.36x = 7,117.56 × 3,974.16
4. Step 4: Simplify right side
   5,155.36x = 28,286,322.25
5. Step 5: Solve for x
   x = 28,286,322.25/5,155.36
6. Step 6: Final answer
   x = 5,486.78