Finding the Fourth Proportional to 13,390.62, 20,072.00 and 4,499.36

Step by Step Solution

1. Step 1: Write the proportion equation
   13,390.62 : 20,072.00 = 4,499.36 : x
2. Step 2: Convert to fraction form
   13,390.62/20,072.00 = 4,499.36/x
3. Step 3: Cross multiply
   13,390.62x = 20,072.00 × 4,499.36
4. Step 4: Simplify right side
   13,390.62x = 90,311,031.06
5. Step 5: Solve for x
   x = 90,311,031.06/13,390.62
6. Step 6: Final answer
   x = 6,744.35