Finding the Fourth Proportional to 6,111.45, 8,421.71 and 4,338.09

Step by Step Solution

1. Step 1: Write the proportion equation
   6,111.45 : 8,421.71 = 4,338.09 : x
2. Step 2: Convert to fraction form
   6,111.45/8,421.71 = 4,338.09/x
3. Step 3: Cross multiply
   6,111.45x = 8,421.71 × 4,338.09
4. Step 4: Simplify right side
   6,111.45x = 36,534,114.24
5. Step 5: Solve for x
   x = 36,534,114.24/6,111.45
6. Step 6: Final answer
   x = 5,977.98