Finding the Fourth Proportional to 6,291.72, 8,678.88 and 3,935.03

Step by Step Solution

1. Step 1: Write the proportion equation
   6,291.72 : 8,678.88 = 3,935.03 : x
2. Step 2: Convert to fraction form
   6,291.72/8,678.88 = 3,935.03/x
3. Step 3: Cross multiply
   6,291.72x = 8,678.88 × 3,935.03
4. Step 4: Simplify right side
   6,291.72x = 34,151,609.77
5. Step 5: Solve for x
   x = 34,151,609.77/6,291.72
6. Step 6: Final answer
   x = 5,428.02