Finding the Fourth Proportional to 9,997.36, 13,796.20 and 5,521

Step by Step Solution

1. Step 1: Write the proportion equation
   9,997.36 : 13,796.20 = 5,521 : x
2. Step 2: Convert to fraction form
   9,997.36/13,796.20 = 5,521/x
3. Step 3: Cross multiply
   9,997.36x = 13,796.20 × 5,521
4. Step 4: Simplify right side
   9,997.36x = 76,168,820.20
5. Step 5: Solve for x
   x = 76,168,820.20/9,997.36
6. Step 6: Final answer
   x = 7,618.89