Finding the Fourth Proportional to 2,810.69, 4,217.55 and 1,056.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,810.69 : 4,217.55 = 1,056.89 : x
2. Step 2: Convert to fraction form
   2,810.69/4,217.55 = 1,056.89/x
3. Step 3: Cross multiply
   2,810.69x = 4,217.55 × 1,056.89
4. Step 4: Simplify right side
   2,810.69x = 4,457,486.42
5. Step 5: Solve for x
   x = 4,457,486.42/2,810.69
6. Step 6: Final answer
   x = 1,585.90