Finding the Fourth Proportional to 6,141.78, 8,478.18 and 4,155.03

Step by Step Solution

1. Step 1: Write the proportion equation
   6,141.78 : 8,478.18 = 4,155.03 : x
2. Step 2: Convert to fraction form
   6,141.78/8,478.18 = 4,155.03/x
3. Step 3: Cross multiply
   6,141.78x = 8,478.18 × 4,155.03
4. Step 4: Simplify right side
   6,141.78x = 35,227,092.25
5. Step 5: Solve for x
   x = 35,227,092.25/6,141.78
6. Step 6: Final answer
   x = 5,735.65