Finding the Fourth Proportional to 2,832.10, 4,242.66 and 1,405.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,832.10 : 4,242.66 = 1,405.31 : x
2. Step 2: Convert to fraction form
   2,832.10/4,242.66 = 1,405.31/x
3. Step 3: Cross multiply
   2,832.10x = 4,242.66 × 1,405.31
4. Step 4: Simplify right side
   2,832.10x = 5,962,252.52
5. Step 5: Solve for x
   x = 5,962,252.52/2,832.10
6. Step 6: Final answer
   x = 2,105.24