Finding the Fourth Proportional to 2,800.14, 4,200.72 and 1,155.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,800.14 : 4,200.72 = 1,155.78 : x
2. Step 2: Convert to fraction form
   2,800.14/4,200.72 = 1,155.78/x
3. Step 3: Cross multiply
   2,800.14x = 4,200.72 × 1,155.78
4. Step 4: Simplify right side
   2,800.14x = 4,855,108.16
5. Step 5: Solve for x
   x = 4,855,108.16/2,800.14
6. Step 6: Final answer
   x = 1,733.88