Finding the Fourth Proportional to 2,291.16, 3,160.05 and 1,406.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,291.16 : 3,160.05 = 1,406.22 : x
2. Step 2: Convert to fraction form
   2,291.16/3,160.05 = 1,406.22/x
3. Step 3: Cross multiply
   2,291.16x = 3,160.05 × 1,406.22
4. Step 4: Simplify right side
   2,291.16x = 4,443,725.51
5. Step 5: Solve for x
   x = 4,443,725.51/2,291.16
6. Step 6: Final answer
   x = 1,939.51