Finding the Fourth Proportional to 9,997.93, 13,797.39 and 5,521.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,997.93 : 13,797.39 = 5,521.72 : x
2. Step 2: Convert to fraction form
   9,997.93/13,797.39 = 5,521.72/x
3. Step 3: Cross multiply
   9,997.93x = 13,797.39 × 5,521.72
4. Step 4: Simplify right side
   9,997.93x = 76,185,324.31
5. Step 5: Solve for x
   x = 76,185,324.31/9,997.93
6. Step 6: Final answer
   x = 7,620.11