Finding the Fourth Proportional to 6,845.62, 10,280.12 and 4,089.40

Step by Step Solution

1. Step 1: Write the proportion equation
   6,845.62 : 10,280.12 = 4,089.40 : x
2. Step 2: Convert to fraction form
   6,845.62/10,280.12 = 4,089.40/x
3. Step 3: Cross multiply
   6,845.62x = 10,280.12 × 4,089.40
4. Step 4: Simplify right side
   6,845.62x = 42,039,522.73
5. Step 5: Solve for x
   x = 42,039,522.73/6,845.62
6. Step 6: Final answer
   x = 6,141.08