Finding the Fourth Proportional to 2,291.72, 3,162.64 and 1,408.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,291.72 : 3,162.64 = 1,408.04 : x
2. Step 2: Convert to fraction form
   2,291.72/3,162.64 = 1,408.04/x
3. Step 3: Cross multiply
   2,291.72x = 3,162.64 × 1,408.04
4. Step 4: Simplify right side
   2,291.72x = 4,453,123.63
5. Step 5: Solve for x
   x = 4,453,123.63/2,291.72
6. Step 6: Final answer
   x = 1,943.14