Finding the Fourth Proportional to 3,353.31, 5,030.40 and 1,405.05

Step by Step Solution

1. Step 1: Write the proportion equation
   3,353.31 : 5,030.40 = 1,405.05 : x
2. Step 2: Convert to fraction form
   3,353.31/5,030.40 = 1,405.05/x
3. Step 3: Cross multiply
   3,353.31x = 5,030.40 × 1,405.05
4. Step 4: Simplify right side
   3,353.31x = 7,067,963.52
5. Step 5: Solve for x
   x = 7,067,963.52/3,353.31
6. Step 6: Final answer
   x = 2,107.76