Finding the Fourth Proportional to 2,291.06, 3,161.67 and 1,406.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,291.06 : 3,161.67 = 1,406.86 : x
2. Step 2: Convert to fraction form
   2,291.06/3,161.67 = 1,406.86/x
3. Step 3: Cross multiply
   2,291.06x = 3,161.67 × 1,406.86
4. Step 4: Simplify right side
   2,291.06x = 4,448,024.43
5. Step 5: Solve for x
   x = 4,448,024.43/2,291.06
6. Step 6: Final answer
   x = 1,941.47