Finding the Fourth Proportional to 2,849.76, 4,279.56 and 1,390.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,849.76 : 4,279.56 = 1,390.56 : x
2. Step 2: Convert to fraction form
   2,849.76/4,279.56 = 1,390.56/x
3. Step 3: Cross multiply
   2,849.76x = 4,279.56 × 1,390.56
4. Step 4: Simplify right side
   2,849.76x = 5,950,984.95
5. Step 5: Solve for x
   x = 5,950,984.95/2,849.76
6. Step 6: Final answer
   x = 2,088.24