Finding the Fourth Proportional to 8,910.82, 12,289.35 and 5,503.71

Step by Step Solution

1. Step 1: Write the proportion equation
   8,910.82 : 12,289.35 = 5,503.71 : x
2. Step 2: Convert to fraction form
   8,910.82/12,289.35 = 5,503.71/x
3. Step 3: Cross multiply
   8,910.82x = 12,289.35 × 5,503.71
4. Step 4: Simplify right side
   8,910.82x = 67,637,018.49
5. Step 5: Solve for x
   x = 67,637,018.49/8,910.82
6. Step 6: Final answer
   x = 7,590.44