Finding the Fourth Proportional to 8,910.84, 12,298.32 and 5,554.20

Step by Step Solution

1. Step 1: Write the proportion equation
   8,910.84 : 12,298.32 = 5,554.20 : x
2. Step 2: Convert to fraction form
   8,910.84/12,298.32 = 5,554.20/x
3. Step 3: Cross multiply
   8,910.84x = 12,298.32 × 5,554.20
4. Step 4: Simplify right side
   8,910.84x = 68,307,328.94
5. Step 5: Solve for x
   x = 68,307,328.94/8,910.84
6. Step 6: Final answer
   x = 7,665.64