Finding the Fourth Proportional to 6,111.83, 9,170.35 and 4,139.69

Step by Step Solution

1. Step 1: Write the proportion equation
   6,111.83 : 9,170.35 = 4,139.69 : x
2. Step 2: Convert to fraction form
   6,111.83/9,170.35 = 4,139.69/x
3. Step 3: Cross multiply
   6,111.83x = 9,170.35 × 4,139.69
4. Step 4: Simplify right side
   6,111.83x = 37,962,349.99
5. Step 5: Solve for x
   x = 37,962,349.99/6,111.83
6. Step 6: Final answer
   x = 6,211.29