Finding the Fourth Proportional to 9,890.72, 13,649.19 and 5,414.48

Step by Step Solution

1. Step 1: Write the proportion equation
   9,890.72 : 13,649.19 = 5,414.48 : x
2. Step 2: Convert to fraction form
   9,890.72/13,649.19 = 5,414.48/x
3. Step 3: Cross multiply
   9,890.72x = 13,649.19 × 5,414.48
4. Step 4: Simplify right side
   9,890.72x = 73,903,198.03
5. Step 5: Solve for x
   x = 73,903,198.03/9,890.72
6. Step 6: Final answer
   x = 7,471.97