Finding the Fourth Proportional to 6,406.72, 8,841.88 and 3,888.26

Step by Step Solution

1. Step 1: Write the proportion equation
   6,406.72 : 8,841.88 = 3,888.26 : x
2. Step 2: Convert to fraction form
   6,406.72/8,841.88 = 3,888.26/x
3. Step 3: Cross multiply
   6,406.72x = 8,841.88 × 3,888.26
4. Step 4: Simplify right side
   6,406.72x = 34,379,528.33
5. Step 5: Solve for x
   x = 34,379,528.33/6,406.72
6. Step 6: Final answer
   x = 5,366.17