Finding the Fourth Proportional to 13,200.48, 19,803.78 and 3,840.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,200.48 : 19,803.78 = 3,840.72 : x
2. Step 2: Convert to fraction form
   13,200.48/19,803.78 = 3,840.72/x
3. Step 3: Cross multiply
   13,200.48x = 19,803.78 × 3,840.72
4. Step 4: Simplify right side
   13,200.48x = 76,060,773.92
5. Step 5: Solve for x
   x = 76,060,773.92/13,200.48
6. Step 6: Final answer
   x = 5,761.97