Finding the Fourth Proportional to 8,570.02, 12,858.66 and 3,640.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,570.02 : 12,858.66 = 3,640.72 : x
2. Step 2: Convert to fraction form
   8,570.02/12,858.66 = 3,640.72/x
3. Step 3: Cross multiply
   8,570.02x = 12,858.66 × 3,640.72
4. Step 4: Simplify right side
   8,570.02x = 46,814,780.64
5. Step 5: Solve for x
   x = 46,814,780.64/8,570.02
6. Step 6: Final answer
   x = 5,462.62