Finding the Fourth Proportional to 8,706.59, 12,015.34 and 4,878.53

Step by Step Solution

1. Step 1: Write the proportion equation
   8,706.59 : 12,015.34 = 4,878.53 : x
2. Step 2: Convert to fraction form
   8,706.59/12,015.34 = 4,878.53/x
3. Step 3: Cross multiply
   8,706.59x = 12,015.34 × 4,878.53
4. Step 4: Simplify right side
   8,706.59x = 58,617,169.43
5. Step 5: Solve for x
   x = 58,617,169.43/8,706.59
6. Step 6: Final answer
   x = 6,732.51