Finding the Fourth Proportional to 2,034.82, 2,807.58 and 1,405.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,034.82 : 2,807.58 = 1,405.90 : x
2. Step 2: Convert to fraction form
   2,034.82/2,807.58 = 1,405.90/x
3. Step 3: Cross multiply
   2,034.82x = 2,807.58 × 1,405.90
4. Step 4: Simplify right side
   2,034.82x = 3,947,176.72
5. Step 5: Solve for x
   x = 3,947,176.72/2,034.82
6. Step 6: Final answer
   x = 1,939.82