Finding the Fourth Proportional to 2,289.98, 3,158.57 and 1,406.13

Step by Step Solution

1. Step 1: Write the proportion equation
   2,289.98 : 3,158.57 = 1,406.13 : x
2. Step 2: Convert to fraction form
   2,289.98/3,158.57 = 1,406.13/x
3. Step 3: Cross multiply
   2,289.98x = 3,158.57 × 1,406.13
4. Step 4: Simplify right side
   2,289.98x = 4,441,353.00
5. Step 5: Solve for x
   x = 4,441,353.00/2,289.98
6. Step 6: Final answer
   x = 1,939.48