Finding the Fourth Proportional to 13,200.47, 19,800.49 and 3,205.30

Step by Step Solution

1. Step 1: Write the proportion equation
   13,200.47 : 19,800.49 = 3,205.30 : x
2. Step 2: Convert to fraction form
   13,200.47/19,800.49 = 3,205.30/x
3. Step 3: Cross multiply
   13,200.47x = 19,800.49 × 3,205.30
4. Step 4: Simplify right side
   13,200.47x = 63,466,449.54
5. Step 5: Solve for x
   x = 63,466,449.54/13,200.47
6. Step 6: Final answer
   x = 4,807.89