Finding the Fourth Proportional to 2,199.72, 3,295.21 and 1,158.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,199.72 : 3,295.21 = 1,158.15 : x
2. Step 2: Convert to fraction form
   2,199.72/3,295.21 = 1,158.15/x
3. Step 3: Cross multiply
   2,199.72x = 3,295.21 × 1,158.15
4. Step 4: Simplify right side
   2,199.72x = 3,816,347.46
5. Step 5: Solve for x
   x = 3,816,347.46/2,199.72
6. Step 6: Final answer
   x = 1,734.92