Finding the Fourth Proportional to 5,158.74, 7,119.81 and 2,921.52

Step by Step Solution

1. Step 1: Write the proportion equation
   5,158.74 : 7,119.81 = 2,921.52 : x
2. Step 2: Convert to fraction form
   5,158.74/7,119.81 = 2,921.52/x
3. Step 3: Cross multiply
   5,158.74x = 7,119.81 × 2,921.52
4. Step 4: Simplify right side
   5,158.74x = 20,800,667.31
5. Step 5: Solve for x
   x = 20,800,667.31/5,158.74
6. Step 6: Final answer
   x = 4,032.12