Finding the Fourth Proportional to 5,787.98, 7,990.18 and 3,877.09

Step by Step Solution

1. Step 1: Write the proportion equation
   5,787.98 : 7,990.18 = 3,877.09 : x
2. Step 2: Convert to fraction form
   5,787.98/7,990.18 = 3,877.09/x
3. Step 3: Cross multiply
   5,787.98x = 7,990.18 × 3,877.09
4. Step 4: Simplify right side
   5,787.98x = 30,978,631.60
5. Step 5: Solve for x
   x = 30,978,631.60/5,787.98
6. Step 6: Final answer
   x = 5,352.23