Finding the Fourth Proportional to 6,429.78, 8,872.56 and 5,959.62

Step by Step Solution

1. Step 1: Write the proportion equation
   6,429.78 : 8,872.56 = 5,959.62 : x
2. Step 2: Convert to fraction form
   6,429.78/8,872.56 = 5,959.62/x
3. Step 3: Cross multiply
   6,429.78x = 8,872.56 × 5,959.62
4. Step 4: Simplify right side
   6,429.78x = 52,877,086.03
5. Step 5: Solve for x
   x = 52,877,086.03/6,429.78
6. Step 6: Final answer
   x = 8,223.78