Finding the Fourth Proportional to 2,788.34, 4,184.13 and 1,057.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,788.34 : 4,184.13 = 1,057.10 : x
2. Step 2: Convert to fraction form
   2,788.34/4,184.13 = 1,057.10/x
3. Step 3: Cross multiply
   2,788.34x = 4,184.13 × 1,057.10
4. Step 4: Simplify right side
   2,788.34x = 4,423,043.82
5. Step 5: Solve for x
   x = 4,423,043.82/2,788.34
6. Step 6: Final answer
   x = 1,586.26