Finding the Fourth Proportional to 6,111.78, 8,434.29 and 3,317.28

Step by Step Solution

1. Step 1: Write the proportion equation
   6,111.78 : 8,434.29 = 3,317.28 : x
2. Step 2: Convert to fraction form
   6,111.78/8,434.29 = 3,317.28/x
3. Step 3: Cross multiply
   6,111.78x = 8,434.29 × 3,317.28
4. Step 4: Simplify right side
   6,111.78x = 27,978,901.53
5. Step 5: Solve for x
   x = 27,978,901.53/6,111.78
6. Step 6: Final answer
   x = 4,577.86