Finding the Fourth Proportional to 8,016.31, 12,021.58 and 4,685.69

Step by Step Solution

1. Step 1: Write the proportion equation
   8,016.31 : 12,021.58 = 4,685.69 : x
2. Step 2: Convert to fraction form
   8,016.31/12,021.58 = 4,685.69/x
3. Step 3: Cross multiply
   8,016.31x = 12,021.58 × 4,685.69
4. Step 4: Simplify right side
   8,016.31x = 56,329,415.53
5. Step 5: Solve for x
   x = 56,329,415.53/8,016.31
6. Step 6: Final answer
   x = 7,026.85