Finding the Fourth Proportional to 2,151.84, 3,228.24 and 1,056.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,151.84 : 3,228.24 = 1,056.72 : x
2. Step 2: Convert to fraction form
   2,151.84/3,228.24 = 1,056.72/x
3. Step 3: Cross multiply
   2,151.84x = 3,228.24 × 1,056.72
4. Step 4: Simplify right side
   2,151.84x = 3,411,345.77
5. Step 5: Solve for x
   x = 3,411,345.77/2,151.84
6. Step 6: Final answer
   x = 1,585.32