Finding the Fourth Proportional to 8,686.56, 13,016.88 and 8,038.56

Step by Step Solution

1. Step 1: Write the proportion equation
   8,686.56 : 13,016.88 = 8,038.56 : x
2. Step 2: Convert to fraction form
   8,686.56/13,016.88 = 8,038.56/x
3. Step 3: Cross multiply
   8,686.56x = 13,016.88 × 8,038.56
4. Step 4: Simplify right side
   8,686.56x = 104,636,970.89
5. Step 5: Solve for x
   x = 104,636,970.89/8,686.56
6. Step 6: Final answer
   x = 12,045.85