Finding the Fourth Proportional to 6,839.26, 9,438.89 and 4,188.43

Step by Step Solution

1. Step 1: Write the proportion equation
   6,839.26 : 9,438.89 = 4,188.43 : x
2. Step 2: Convert to fraction form
   6,839.26/9,438.89 = 4,188.43/x
3. Step 3: Cross multiply
   6,839.26x = 9,438.89 × 4,188.43
4. Step 4: Simplify right side
   6,839.26x = 39,534,061.91
5. Step 5: Solve for x
   x = 39,534,061.91/6,839.26
6. Step 6: Final answer
   x = 5,780.46