Finding the Fourth Proportional to 13,200.54, 19,801.71 and 3,840.57

Step by Step Solution

1. Step 1: Write the proportion equation
   13,200.54 : 19,801.71 = 3,840.57 : x
2. Step 2: Convert to fraction form
   13,200.54/19,801.71 = 3,840.57/x
3. Step 3: Cross multiply
   13,200.54x = 19,801.71 × 3,840.57
4. Step 4: Simplify right side
   13,200.54x = 76,049,853.37
5. Step 5: Solve for x
   x = 76,049,853.37/13,200.54
6. Step 6: Final answer
   x = 5,761.12