Finding the Fourth Proportional to 9,994.12, 13,792.20 and 5,518.04

Step by Step Solution

1. Step 1: Write the proportion equation
   9,994.12 : 13,792.20 = 5,518.04 : x
2. Step 2: Convert to fraction form
   9,994.12/13,792.20 = 5,518.04/x
3. Step 3: Cross multiply
   9,994.12x = 13,792.20 × 5,518.04
4. Step 4: Simplify right side
   9,994.12x = 76,105,911.29
5. Step 5: Solve for x
   x = 76,105,911.29/9,994.12
6. Step 6: Final answer
   x = 7,615.07