Finding the Fourth Proportional to 13,288.24, 19,919.40 and 5,492.80

Step by Step Solution

1. Step 1: Write the proportion equation
   13,288.24 : 19,919.40 = 5,492.80 : x
2. Step 2: Convert to fraction form
   13,288.24/19,919.40 = 5,492.80/x
3. Step 3: Cross multiply
   13,288.24x = 19,919.40 × 5,492.80
4. Step 4: Simplify right side
   13,288.24x = 109,413,280.32
5. Step 5: Solve for x
   x = 109,413,280.32/13,288.24
6. Step 6: Final answer
   x = 8,233.84