Finding the Fourth Proportional to 3,922.26, 5,412.72 and 2,153.82

Step by Step Solution

1. Step 1: Write the proportion equation
   3,922.26 : 5,412.72 = 2,153.82 : x
2. Step 2: Convert to fraction form
   3,922.26/5,412.72 = 2,153.82/x
3. Step 3: Cross multiply
   3,922.26x = 5,412.72 × 2,153.82
4. Step 4: Simplify right side
   3,922.26x = 11,658,024.59
5. Step 5: Solve for x
   x = 11,658,024.59/3,922.26
6. Step 6: Final answer
   x = 2,972.27