Finding the Fourth Proportional to 2,111.21, 3,163.26 and 1,491.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.21 : 3,163.26 = 1,491.86 : x
2. Step 2: Convert to fraction form
   2,111.21/3,163.26 = 1,491.86/x
3. Step 3: Cross multiply
   2,111.21x = 3,163.26 × 1,491.86
4. Step 4: Simplify right side
   2,111.21x = 4,719,141.06
5. Step 5: Solve for x
   x = 4,719,141.06/2,111.21
6. Step 6: Final answer
   x = 2,235.28