Finding the Fourth Proportional to 9,998.04, 13,797.72 and 5,522.40

Step by Step Solution

1. Step 1: Write the proportion equation
   9,998.04 : 13,797.72 = 5,522.40 : x
2. Step 2: Convert to fraction form
   9,998.04/13,797.72 = 5,522.40/x
3. Step 3: Cross multiply
   9,998.04x = 13,797.72 × 5,522.40
4. Step 4: Simplify right side
   9,998.04x = 76,196,528.93
5. Step 5: Solve for x
   x = 76,196,528.93/9,998.04
6. Step 6: Final answer
   x = 7,621.15