Finding the Fourth Proportional to 2,152.19, 3,228.57 and 1,056.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,152.19 : 3,228.57 = 1,056.57 : x
2. Step 2: Convert to fraction form
   2,152.19/3,228.57 = 1,056.57/x
3. Step 3: Cross multiply
   2,152.19x = 3,228.57 × 1,056.57
4. Step 4: Simplify right side
   2,152.19x = 3,411,210.20
5. Step 5: Solve for x
   x = 3,411,210.20/2,152.19
6. Step 6: Final answer
   x = 1,585.00