Finding the Fourth Proportional to 2,155.46, 3,228.93 and 1,056.51

Step by Step Solution

1. Step 1: Write the proportion equation
   2,155.46 : 3,228.93 = 1,056.51 : x
2. Step 2: Convert to fraction form
   2,155.46/3,228.93 = 1,056.51/x
3. Step 3: Cross multiply
   2,155.46x = 3,228.93 × 1,056.51
4. Step 4: Simplify right side
   2,155.46x = 3,411,396.83
5. Step 5: Solve for x
   x = 3,411,396.83/2,155.46
6. Step 6: Final answer
   x = 1,582.68