Finding the Fourth Proportional to 6,156.86, 8,496.08 and 3,638.40

Step by Step Solution

1. Step 1: Write the proportion equation
   6,156.86 : 8,496.08 = 3,638.40 : x
2. Step 2: Convert to fraction form
   6,156.86/8,496.08 = 3,638.40/x
3. Step 3: Cross multiply
   6,156.86x = 8,496.08 × 3,638.40
4. Step 4: Simplify right side
   6,156.86x = 30,912,137.47
5. Step 5: Solve for x
   x = 30,912,137.47/6,156.86
6. Step 6: Final answer
   x = 5,020.77