Finding the Fourth Proportional to 5,498.69, 7,578.01 and 3,905.40

Step by Step Solution

1. Step 1: Write the proportion equation
   5,498.69 : 7,578.01 = 3,905.40 : x
2. Step 2: Convert to fraction form
   5,498.69/7,578.01 = 3,905.40/x
3. Step 3: Cross multiply
   5,498.69x = 7,578.01 × 3,905.40
4. Step 4: Simplify right side
   5,498.69x = 29,595,193.55
5. Step 5: Solve for x
   x = 29,595,193.55/5,498.69
6. Step 6: Final answer
   x = 5,382.23