Finding the Fourth Proportional to 2,152.17, 3,228.54 and 1,056.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,152.17 : 3,228.54 = 1,056.57 : x
2. Step 2: Convert to fraction form
   2,152.17/3,228.54 = 1,056.57/x
3. Step 3: Cross multiply
   2,152.17x = 3,228.54 × 1,056.57
4. Step 4: Simplify right side
   2,152.17x = 3,411,178.51
5. Step 5: Solve for x
   x = 3,411,178.51/2,152.17
6. Step 6: Final answer
   x = 1,584.99