Finding the Fourth Proportional to 6,404.79, 8,839.71 and 3,889.02

Step by Step Solution

1. Step 1: Write the proportion equation
   6,404.79 : 8,839.71 = 3,889.02 : x
2. Step 2: Convert to fraction form
   6,404.79/8,839.71 = 3,889.02/x
3. Step 3: Cross multiply
   6,404.79x = 8,839.71 × 3,889.02
4. Step 4: Simplify right side
   6,404.79x = 34,377,808.98
5. Step 5: Solve for x
   x = 34,377,808.98/6,404.79
6. Step 6: Final answer
   x = 5,367.52