Finding the Fourth Proportional to 13,200.54, 19,805.37 and 8,264.30

Step by Step Solution

1. Step 1: Write the proportion equation
   13,200.54 : 19,805.37 = 8,264.30 : x
2. Step 2: Convert to fraction form
   13,200.54/19,805.37 = 8,264.30/x
3. Step 3: Cross multiply
   13,200.54x = 19,805.37 × 8,264.30
4. Step 4: Simplify right side
   13,200.54x = 163,677,463.54
5. Step 5: Solve for x
   x = 163,677,463.54/13,200.54
6. Step 6: Final answer
   x = 12,399.30