Finding the Fourth Proportional to 8,885.20, 12,262.17 and 5,109.61

Step by Step Solution

1. Step 1: Write the proportion equation
   8,885.20 : 12,262.17 = 5,109.61 : x
2. Step 2: Convert to fraction form
   8,885.20/12,262.17 = 5,109.61/x
3. Step 3: Cross multiply
   8,885.20x = 12,262.17 × 5,109.61
4. Step 4: Simplify right side
   8,885.20x = 62,654,906.45
5. Step 5: Solve for x
   x = 62,654,906.45/8,885.20
6. Step 6: Final answer
   x = 7,051.60