Finding the Fourth Proportional to 2,800.10, 4,200.06 and 1,155.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,800.10 : 4,200.06 = 1,155.39 : x
2. Step 2: Convert to fraction form
   2,800.10/4,200.06 = 1,155.39/x
3. Step 3: Cross multiply
   2,800.10x = 4,200.06 × 1,155.39
4. Step 4: Simplify right side
   2,800.10x = 4,852,707.32
5. Step 5: Solve for x
   x = 4,852,707.32/2,800.10
6. Step 6: Final answer
   x = 1,733.05