Finding the Fourth Proportional to 6,111.56, 8,434.08 and 3,721.64

Step by Step Solution

1. Step 1: Write the proportion equation
   6,111.56 : 8,434.08 = 3,721.64 : x
2. Step 2: Convert to fraction form
   6,111.56/8,434.08 = 3,721.64/x
3. Step 3: Cross multiply
   6,111.56x = 8,434.08 × 3,721.64
4. Step 4: Simplify right side
   6,111.56x = 31,388,567.32
5. Step 5: Solve for x
   x = 31,388,567.32/6,111.56
6. Step 6: Final answer
   x = 5,135.93