Finding the Fourth Proportional to 5,388.05, 7,435.89 and 2,998.55

Step by Step Solution

1. Step 1: Write the proportion equation
   5,388.05 : 7,435.89 = 2,998.55 : x
2. Step 2: Convert to fraction form
   5,388.05/7,435.89 = 2,998.55/x
3. Step 3: Cross multiply
   5,388.05x = 7,435.89 × 2,998.55
4. Step 4: Simplify right side
   5,388.05x = 22,296,850.78
5. Step 5: Solve for x
   x = 22,296,850.78/5,388.05
6. Step 6: Final answer
   x = 4,138.21