Finding the Fourth Proportional to 3,834.36, 5,291.72 and 2,156.18

Step by Step Solution

1. Step 1: Write the proportion equation
   3,834.36 : 5,291.72 = 2,156.18 : x
2. Step 2: Convert to fraction form
   3,834.36/5,291.72 = 2,156.18/x
3. Step 3: Cross multiply
   3,834.36x = 5,291.72 × 2,156.18
4. Step 4: Simplify right side
   3,834.36x = 11,409,900.83
5. Step 5: Solve for x
   x = 11,409,900.83/3,834.36
6. Step 6: Final answer
   x = 2,975.70