Finding the Fourth Proportional to 12,845.79, 17,721.72 and 8,062.47

Step by Step Solution

1. Step 1: Write the proportion equation
   12,845.79 : 17,721.72 = 8,062.47 : x
2. Step 2: Convert to fraction form
   12,845.79/17,721.72 = 8,062.47/x
3. Step 3: Cross multiply
   12,845.79x = 17,721.72 × 8,062.47
4. Step 4: Simplify right side
   12,845.79x = 142,880,835.85
5. Step 5: Solve for x
   x = 142,880,835.85/12,845.79
6. Step 6: Final answer
   x = 11,122.78