Finding the Fourth Proportional to 13,196.10, 19,766.61 and 7,914.36

Step by Step Solution

1. Step 1: Write the proportion equation
   13,196.10 : 19,766.61 = 7,914.36 : x
2. Step 2: Convert to fraction form
   13,196.10/19,766.61 = 7,914.36/x
3. Step 3: Cross multiply
   13,196.10x = 19,766.61 × 7,914.36
4. Step 4: Simplify right side
   13,196.10x = 156,440,067.52
5. Step 5: Solve for x
   x = 156,440,067.52/13,196.10
6. Step 6: Final answer
   x = 11,855.02