Finding the Fourth Proportional to 8,611.56, 12,918.78 and 3,068.10

Step by Step Solution

1. Step 1: Write the proportion equation
   8,611.56 : 12,918.78 = 3,068.10 : x
2. Step 2: Convert to fraction form
   8,611.56/12,918.78 = 3,068.10/x
3. Step 3: Cross multiply
   8,611.56x = 12,918.78 × 3,068.10
4. Step 4: Simplify right side
   8,611.56x = 39,636,108.92
5. Step 5: Solve for x
   x = 39,636,108.92/8,611.56
6. Step 6: Final answer
   x = 4,602.66