Finding the Fourth Proportional to 8,601.95, 12,899.83 and 2,978.09

Step by Step Solution

1. Step 1: Write the proportion equation
   8,601.95 : 12,899.83 = 2,978.09 : x
2. Step 2: Convert to fraction form
   8,601.95/12,899.83 = 2,978.09/x
3. Step 3: Cross multiply
   8,601.95x = 12,899.83 × 2,978.09
4. Step 4: Simplify right side
   8,601.95x = 38,416,855.34
5. Step 5: Solve for x
   x = 38,416,855.34/8,601.95
6. Step 6: Final answer
   x = 4,466.06