Finding the Fourth Proportional to 8,445.59, 12,670.59 and 3,180.65

Step by Step Solution

1. Step 1: Write the proportion equation
   8,445.59 : 12,670.59 = 3,180.65 : x
2. Step 2: Convert to fraction form
   8,445.59/12,670.59 = 3,180.65/x
3. Step 3: Cross multiply
   8,445.59x = 12,670.59 × 3,180.65
4. Step 4: Simplify right side
   8,445.59x = 40,300,648.73
5. Step 5: Solve for x
   x = 40,300,648.73/8,445.59
6. Step 6: Final answer
   x = 4,771.80