Finding the Fourth Proportional to 2,115.72, 2,919.42 and 1,184.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,115.72 : 2,919.42 = 1,184.22 : x
2. Step 2: Convert to fraction form
   2,115.72/2,919.42 = 1,184.22/x
3. Step 3: Cross multiply
   2,115.72x = 2,919.42 × 1,184.22
4. Step 4: Simplify right side
   2,115.72x = 3,457,235.55
5. Step 5: Solve for x
   x = 3,457,235.55/2,115.72
6. Step 6: Final answer
   x = 1,634.07