Finding the Fourth Proportional to 2,616.96, 3,926.22 and 1,056.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,616.96 : 3,926.22 = 1,056.16 : x
2. Step 2: Convert to fraction form
   2,616.96/3,926.22 = 1,056.16/x
3. Step 3: Cross multiply
   2,616.96x = 3,926.22 × 1,056.16
4. Step 4: Simplify right side
   2,616.96x = 4,146,716.52
5. Step 5: Solve for x
   x = 4,146,716.52/2,616.96
6. Step 6: Final answer
   x = 1,584.55