Finding the Fourth Proportional to 13,091.02, 18,067.12 and 7,785.79

Step by Step Solution

1. Step 1: Write the proportion equation
   13,091.02 : 18,067.12 = 7,785.79 : x
2. Step 2: Convert to fraction form
   13,091.02/18,067.12 = 7,785.79/x
3. Step 3: Cross multiply
   13,091.02x = 18,067.12 × 7,785.79
4. Step 4: Simplify right side
   13,091.02x = 140,666,737.59
5. Step 5: Solve for x
   x = 140,666,737.59/13,091.02
6. Step 6: Final answer
   x = 10,745.29