Finding the Fourth Proportional to 8,321.76, 12,484.86 and 3,640.86

Step by Step Solution

1. Step 1: Write the proportion equation
   8,321.76 : 12,484.86 = 3,640.86 : x
2. Step 2: Convert to fraction form
   8,321.76/12,484.86 = 3,640.86/x
3. Step 3: Cross multiply
   8,321.76x = 12,484.86 × 3,640.86
4. Step 4: Simplify right side
   8,321.76x = 45,455,627.38
5. Step 5: Solve for x
   x = 45,455,627.38/8,321.76
6. Step 6: Final answer
   x = 5,462.26