Finding the Fourth Proportional to 3,840.18, 5,720.16 and 3,789.16

Step by Step Solution

1. Step 1: Write the proportion equation
   3,840.18 : 5,720.16 = 3,789.16 : x
2. Step 2: Convert to fraction form
   3,840.18/5,720.16 = 3,789.16/x
3. Step 3: Cross multiply
   3,840.18x = 5,720.16 × 3,789.16
4. Step 4: Simplify right side
   3,840.18x = 21,674,601.47
5. Step 5: Solve for x
   x = 21,674,601.47/3,840.18
6. Step 6: Final answer
   x = 5,644.16