Finding the Fourth Proportional to 6,111.59, 9,169.98 and 4,139.44

Step by Step Solution

1. Step 1: Write the proportion equation
   6,111.59 : 9,169.98 = 4,139.44 : x
2. Step 2: Convert to fraction form
   6,111.59/9,169.98 = 4,139.44/x
3. Step 3: Cross multiply
   6,111.59x = 9,169.98 × 4,139.44
4. Step 4: Simplify right side
   6,111.59x = 37,958,515.46
5. Step 5: Solve for x
   x = 37,958,515.46/6,111.59
6. Step 6: Final answer
   x = 6,210.91