Finding the Fourth Proportional to 2,191.47, 3,288.17 and 1,151.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,191.47 : 3,288.17 = 1,151.23 : x
2. Step 2: Convert to fraction form
   2,191.47/3,288.17 = 1,151.23/x
3. Step 3: Cross multiply
   2,191.47x = 3,288.17 × 1,151.23
4. Step 4: Simplify right side
   2,191.47x = 3,785,439.95
5. Step 5: Solve for x
   x = 3,785,439.95/2,191.47
6. Step 6: Final answer
   x = 1,727.35