Finding the Fourth Proportional to 13,676.16, 18,870.72 and 8,085.12

Step by Step Solution

1. Step 1: Write the proportion equation
   13,676.16 : 18,870.72 = 8,085.12 : x
2. Step 2: Convert to fraction form
   13,676.16/18,870.72 = 8,085.12/x
3. Step 3: Cross multiply
   13,676.16x = 18,870.72 × 8,085.12
4. Step 4: Simplify right side
   13,676.16x = 152,572,035.69
5. Step 5: Solve for x
   x = 152,572,035.69/13,676.16
6. Step 6: Final answer
   x = 11,156.06