Finding the Fourth Proportional to 9,891.57, 13,650.30 and 5,354.22

Step by Step Solution

1. Step 1: Write the proportion equation
   9,891.57 : 13,650.30 = 5,354.22 : x
2. Step 2: Convert to fraction form
   9,891.57/13,650.30 = 5,354.22/x
3. Step 3: Cross multiply
   9,891.57x = 13,650.30 × 5,354.22
4. Step 4: Simplify right side
   9,891.57x = 73,086,709.27
5. Step 5: Solve for x
   x = 73,086,709.27/9,891.57
6. Step 6: Final answer
   x = 7,388.79