Finding the Fourth Proportional to 12,799.88, 19,208.53 and 7,854.42

Step by Step Solution

1. Step 1: Write the proportion equation
   12,799.88 : 19,208.53 = 7,854.42 : x
2. Step 2: Convert to fraction form
   12,799.88/19,208.53 = 7,854.42/x
3. Step 3: Cross multiply
   12,799.88x = 19,208.53 × 7,854.42
4. Step 4: Simplify right side
   12,799.88x = 150,871,899.87
5. Step 5: Solve for x
   x = 150,871,899.87/12,799.88
6. Step 6: Final answer
   x = 11,786.98