Finding the Fourth Proportional to 2,849.55, 4,275.86 and 1,388.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,849.55 : 4,275.86 = 1,388.70 : x
2. Step 2: Convert to fraction form
   2,849.55/4,275.86 = 1,388.70/x
3. Step 3: Cross multiply
   2,849.55x = 4,275.86 × 1,388.70
4. Step 4: Simplify right side
   2,849.55x = 5,937,879.84
5. Step 5: Solve for x
   x = 5,937,879.84/2,849.55
6. Step 6: Final answer
   x = 2,083.80