Finding the Fourth Proportional to 6,819.84, 9,409.10 and 5,558.72

Step by Step Solution

1. Step 1: Write the proportion equation
   6,819.84 : 9,409.10 = 5,558.72 : x
2. Step 2: Convert to fraction form
   6,819.84/9,409.10 = 5,558.72/x
3. Step 3: Cross multiply
   6,819.84x = 9,409.10 × 5,558.72
4. Step 4: Simplify right side
   6,819.84x = 52,302,552.35
5. Step 5: Solve for x
   x = 52,302,552.35/6,819.84
6. Step 6: Final answer
   x = 7,669.18