Finding the Fourth Proportional to 12,739.21, 19,101.38 and 3,851.89

Step by Step Solution

1. Step 1: Write the proportion equation
   12,739.21 : 19,101.38 = 3,851.89 : x
2. Step 2: Convert to fraction form
   12,739.21/19,101.38 = 3,851.89/x
3. Step 3: Cross multiply
   12,739.21x = 19,101.38 × 3,851.89
4. Step 4: Simplify right side
   12,739.21x = 73,576,414.61
5. Step 5: Solve for x
   x = 73,576,414.61/12,739.21
6. Step 6: Final answer
   x = 5,775.59