Finding the Fourth Proportional to 2,152.63, 3,228.64 and 1,056.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,152.63 : 3,228.64 = 1,056.70 : x
2. Step 2: Convert to fraction form
   2,152.63/3,228.64 = 1,056.70/x
3. Step 3: Cross multiply
   2,152.63x = 3,228.64 × 1,056.70
4. Step 4: Simplify right side
   2,152.63x = 3,411,703.89
5. Step 5: Solve for x
   x = 3,411,703.89/2,152.63
6. Step 6: Final answer
   x = 1,584.90