Finding the Fourth Proportional to 6,651.47, 9,977.71 and 3,878.42

Step by Step Solution

1. Step 1: Write the proportion equation
   6,651.47 : 9,977.71 = 3,878.42 : x
2. Step 2: Convert to fraction form
   6,651.47/9,977.71 = 3,878.42/x
3. Step 3: Cross multiply
   6,651.47x = 9,977.71 × 3,878.42
4. Step 4: Simplify right side
   6,651.47x = 38,697,690.43
5. Step 5: Solve for x
   x = 38,697,690.43/6,651.47
6. Step 6: Final answer
   x = 5,817.92