Finding the Fourth Proportional to 6,878.81, 9,492.89 and 4,490.31

Step by Step Solution

1. Step 1: Write the proportion equation
   6,878.81 : 9,492.89 = 4,490.31 : x
2. Step 2: Convert to fraction form
   6,878.81/9,492.89 = 4,490.31/x
3. Step 3: Cross multiply
   6,878.81x = 9,492.89 × 4,490.31
4. Step 4: Simplify right side
   6,878.81x = 42,625,996.44
5. Step 5: Solve for x
   x = 42,625,996.44/6,878.81
6. Step 6: Final answer
   x = 6,196.72