Finding the Fourth Proportional to 11,145.12, 16,698.78 and 7,843.02

Step by Step Solution

1. Step 1: Write the proportion equation
   11,145.12 : 16,698.78 = 7,843.02 : x
2. Step 2: Convert to fraction form
   11,145.12/16,698.78 = 7,843.02/x
3. Step 3: Cross multiply
   11,145.12x = 16,698.78 × 7,843.02
4. Step 4: Simplify right side
   11,145.12x = 130,968,865.52
5. Step 5: Solve for x
   x = 130,968,865.52/11,145.12
6. Step 6: Final answer
   x = 11,751.23