Finding the Fourth Proportional to 13,079.37, 19,606.50 and 8,386.23

Step by Step Solution

1. Step 1: Write the proportion equation
   13,079.37 : 19,606.50 = 8,386.23 : x
2. Step 2: Convert to fraction form
   13,079.37/19,606.50 = 8,386.23/x
3. Step 3: Cross multiply
   13,079.37x = 19,606.50 × 8,386.23
4. Step 4: Simplify right side
   13,079.37x = 164,424,618.50
5. Step 5: Solve for x
   x = 164,424,618.50/13,079.37
6. Step 6: Final answer
   x = 12,571.29