Finding the Fourth Proportional to 2,151.42, 3,229.15 and 1,056.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,151.42 : 3,229.15 = 1,056.57 : x
2. Step 2: Convert to fraction form
   2,151.42/3,229.15 = 1,056.57/x
3. Step 3: Cross multiply
   2,151.42x = 3,229.15 × 1,056.57
4. Step 4: Simplify right side
   2,151.42x = 3,411,823.02
5. Step 5: Solve for x
   x = 3,411,823.02/2,151.42
6. Step 6: Final answer
   x = 1,585.85