Finding the Fourth Proportional to 8,499.62, 12,745.06 and 3,815.63

Step by Step Solution

1. Step 1: Write the proportion equation
   8,499.62 : 12,745.06 = 3,815.63 : x
2. Step 2: Convert to fraction form
   8,499.62/12,745.06 = 3,815.63/x
3. Step 3: Cross multiply
   8,499.62x = 12,745.06 × 3,815.63
4. Step 4: Simplify right side
   8,499.62x = 48,630,360.02
5. Step 5: Solve for x
   x = 48,630,360.02/8,499.62
6. Step 6: Final answer
   x = 5,721.47