Finding the Fourth Proportional to 13,196.53, 19,789.81 and 4,309.78

Step by Step Solution

1. Step 1: Write the proportion equation
   13,196.53 : 19,789.81 = 4,309.78 : x
2. Step 2: Convert to fraction form
   13,196.53/19,789.81 = 4,309.78/x
3. Step 3: Cross multiply
   13,196.53x = 19,789.81 × 4,309.78
4. Step 4: Simplify right side
   13,196.53x = 85,289,727.34
5. Step 5: Solve for x
   x = 85,289,727.34/13,196.53
6. Step 6: Final answer
   x = 6,463.04