Finding the Fourth Proportional to 9,890.82, 13,649.27 and 5,353.47

Step by Step Solution

1. Step 1: Write the proportion equation
   9,890.82 : 13,649.27 = 5,353.47 : x
2. Step 2: Convert to fraction form
   9,890.82/13,649.27 = 5,353.47/x
3. Step 3: Cross multiply
   9,890.82x = 13,649.27 × 5,353.47
4. Step 4: Simplify right side
   9,890.82x = 73,070,930.70
5. Step 5: Solve for x
   x = 73,070,930.70/9,890.82
6. Step 6: Final answer
   x = 7,387.75