Finding the Fourth Proportional to 9,874.55, 13,626.89 and 5,398.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,874.55 : 13,626.89 = 5,398.31 : x
2. Step 2: Convert to fraction form
   9,874.55/13,626.89 = 5,398.31/x
3. Step 3: Cross multiply
   9,874.55x = 13,626.89 × 5,398.31
4. Step 4: Simplify right side
   9,874.55x = 73,562,081.43
5. Step 5: Solve for x
   x = 73,562,081.43/9,874.55
6. Step 6: Final answer
   x = 7,449.67