Finding the Fourth Proportional to 2,891.47, 4,338.02 and 1,161.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,891.47 : 4,338.02 = 1,161.31 : x
2. Step 2: Convert to fraction form
   2,891.47/4,338.02 = 1,161.31/x
3. Step 3: Cross multiply
   2,891.47x = 4,338.02 × 1,161.31
4. Step 4: Simplify right side
   2,891.47x = 5,037,786.01
5. Step 5: Solve for x
   x = 5,037,786.01/2,891.47
6. Step 6: Final answer
   x = 1,742.29