Finding the Fourth Proportional to 13,212.72, 19,820.46 and 4,448.34

Step by Step Solution

1. Step 1: Write the proportion equation
   13,212.72 : 19,820.46 = 4,448.34 : x
2. Step 2: Convert to fraction form
   13,212.72/19,820.46 = 4,448.34/x
3. Step 3: Cross multiply
   13,212.72x = 19,820.46 × 4,448.34
4. Step 4: Simplify right side
   13,212.72x = 88,168,145.04
5. Step 5: Solve for x
   x = 88,168,145.04/13,212.72
6. Step 6: Final answer
   x = 6,672.97