Finding the Fourth Proportional to 9,997.39, 13,796.40 and 5,521.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,997.39 : 13,796.40 = 5,521.15 : x
2. Step 2: Convert to fraction form
   9,997.39/13,796.40 = 5,521.15/x
3. Step 3: Cross multiply
   9,997.39x = 13,796.40 × 5,521.15
4. Step 4: Simplify right side
   9,997.39x = 76,171,993.86
5. Step 5: Solve for x
   x = 76,171,993.86/9,997.39
6. Step 6: Final answer
   x = 7,619.19