Finding the Fourth Proportional to 7,002.78, 9,663.48 and 3,858.36

Step by Step Solution

1. Step 1: Write the proportion equation
   7,002.78 : 9,663.48 = 3,858.36 : x
2. Step 2: Convert to fraction form
   7,002.78/9,663.48 = 3,858.36/x
3. Step 3: Cross multiply
   7,002.78x = 9,663.48 × 3,858.36
4. Step 4: Simplify right side
   7,002.78x = 37,285,184.69
5. Step 5: Solve for x
   x = 37,285,184.69/7,002.78
6. Step 6: Final answer
   x = 5,324.34