Finding the Fourth Proportional to 9,819.84, 13,551.60 and 5,571.18

Step by Step Solution

1. Step 1: Write the proportion equation
   9,819.84 : 13,551.60 = 5,571.18 : x
2. Step 2: Convert to fraction form
   9,819.84/13,551.60 = 5,571.18/x
3. Step 3: Cross multiply
   9,819.84x = 13,551.60 × 5,571.18
4. Step 4: Simplify right side
   9,819.84x = 75,498,402.89
5. Step 5: Solve for x
   x = 75,498,402.89/9,819.84
6. Step 6: Final answer
   x = 7,688.35