Finding the Fourth Proportional to 9,998.12, 13,797.34 and 5,522.16

Step by Step Solution

1. Step 1: Write the proportion equation
   9,998.12 : 13,797.34 = 5,522.16 : x
2. Step 2: Convert to fraction form
   9,998.12/13,797.34 = 5,522.16/x
3. Step 3: Cross multiply
   9,998.12x = 13,797.34 × 5,522.16
4. Step 4: Simplify right side
   9,998.12x = 76,191,119.05
5. Step 5: Solve for x
   x = 76,191,119.05/9,998.12
6. Step 6: Final answer
   x = 7,620.54