Finding the Fourth Proportional to 6,134.78, 8,477.51 and 5,015.31

Step by Step Solution

1. Step 1: Write the proportion equation
   6,134.78 : 8,477.51 = 5,015.31 : x
2. Step 2: Convert to fraction form
   6,134.78/8,477.51 = 5,015.31/x
3. Step 3: Cross multiply
   6,134.78x = 8,477.51 × 5,015.31
4. Step 4: Simplify right side
   6,134.78x = 42,517,315.60
5. Step 5: Solve for x
   x = 42,517,315.60/6,134.78
6. Step 6: Final answer
   x = 6,930.54