Finding the Fourth Proportional to 9,997.28, 13,796.87 and 5,521.01

Step by Step Solution

1. Step 1: Write the proportion equation
   9,997.28 : 13,796.87 = 5,521.01 : x
2. Step 2: Convert to fraction form
   9,997.28/13,796.87 = 5,521.01/x
3. Step 3: Cross multiply
   9,997.28x = 13,796.87 × 5,521.01
4. Step 4: Simplify right side
   9,997.28x = 76,172,560.65
5. Step 5: Solve for x
   x = 76,172,560.65/9,997.28
6. Step 6: Final answer
   x = 7,619.33