Finding the Fourth Proportional to 12,785.25, 17,643.78 and 7,196.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,785.25 : 17,643.78 = 7,196.25 : x
2. Step 2: Convert to fraction form
   12,785.25/17,643.78 = 7,196.25/x
3. Step 3: Cross multiply
   12,785.25x = 17,643.78 × 7,196.25
4. Step 4: Simplify right side
   12,785.25x = 126,969,051.83
5. Step 5: Solve for x
   x = 126,969,051.83/12,785.25
6. Step 6: Final answer
   x = 9,930.90