Finding the Fourth Proportional to 2,850.88, 4,272.72 and 1,390.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,850.88 : 4,272.72 = 1,390.48 : x
2. Step 2: Convert to fraction form
   2,850.88/4,272.72 = 1,390.48/x
3. Step 3: Cross multiply
   2,850.88x = 4,272.72 × 1,390.48
4. Step 4: Simplify right side
   2,850.88x = 5,941,131.71
5. Step 5: Solve for x
   x = 5,941,131.71/2,850.88
6. Step 6: Final answer
   x = 2,083.96