Finding the Fourth Proportional to 5,158.42, 7,118.63 and 2,800.56

Step by Step Solution

1. Step 1: Write the proportion equation
   5,158.42 : 7,118.63 = 2,800.56 : x
2. Step 2: Convert to fraction form
   5,158.42/7,118.63 = 2,800.56/x
3. Step 3: Cross multiply
   5,158.42x = 7,118.63 × 2,800.56
4. Step 4: Simplify right side
   5,158.42x = 19,936,150.43
5. Step 5: Solve for x
   x = 19,936,150.43/5,158.42
6. Step 6: Final answer
   x = 3,864.78