Finding the Fourth Proportional to 13,219.27, 19,816.45 and 4,448.05

Step by Step Solution

1. Step 1: Write the proportion equation
   13,219.27 : 19,816.45 = 4,448.05 : x
2. Step 2: Convert to fraction form
   13,219.27/19,816.45 = 4,448.05/x
3. Step 3: Cross multiply
   13,219.27x = 19,816.45 × 4,448.05
4. Step 4: Simplify right side
   13,219.27x = 88,144,499.76
5. Step 5: Solve for x
   x = 88,144,499.76/13,219.27
6. Step 6: Final answer
   x = 6,667.88