Finding the Fourth Proportional to 12,867.89, 19,299.51 and 3,860.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,867.89 : 19,299.51 = 3,860.15 : x
2. Step 2: Convert to fraction form
   12,867.89/19,299.51 = 3,860.15/x
3. Step 3: Cross multiply
   12,867.89x = 19,299.51 × 3,860.15
4. Step 4: Simplify right side
   12,867.89x = 74,499,003.53
5. Step 5: Solve for x
   x = 74,499,003.53/12,867.89
6. Step 6: Final answer
   x = 5,789.53