Finding the Fourth Proportional to 3,913.69, 5,840.19 and 3,498.25

Step by Step Solution

1. Step 1: Write the proportion equation
   3,913.69 : 5,840.19 = 3,498.25 : x
2. Step 2: Convert to fraction form
   3,913.69/5,840.19 = 3,498.25/x
3. Step 3: Cross multiply
   3,913.69x = 5,840.19 × 3,498.25
4. Step 4: Simplify right side
   3,913.69x = 20,430,444.67
5. Step 5: Solve for x
   x = 20,430,444.67/3,913.69
6. Step 6: Final answer
   x = 5,220.25