Finding the Fourth Proportional to 3,887.78, 5,805.16 and 3,668.52

Step by Step Solution

1. Step 1: Write the proportion equation
   3,887.78 : 5,805.16 = 3,668.52 : x
2. Step 2: Convert to fraction form
   3,887.78/5,805.16 = 3,668.52/x
3. Step 3: Cross multiply
   3,887.78x = 5,805.16 × 3,668.52
4. Step 4: Simplify right side
   3,887.78x = 21,296,345.56
5. Step 5: Solve for x
   x = 21,296,345.56/3,887.78
6. Step 6: Final answer
   x = 5,477.77