Finding the Fourth Proportional to 5,347.69, 7,379.81 and 2,990.05

Step by Step Solution

1. Step 1: Write the proportion equation
   5,347.69 : 7,379.81 = 2,990.05 : x
2. Step 2: Convert to fraction form
   5,347.69/7,379.81 = 2,990.05/x
3. Step 3: Cross multiply
   5,347.69x = 7,379.81 × 2,990.05
4. Step 4: Simplify right side
   5,347.69x = 22,065,978.70
5. Step 5: Solve for x
   x = 22,065,978.70/5,347.69
6. Step 6: Final answer
   x = 4,126.27