Finding the Fourth Proportional to 14,728.69, 20,340.03 and 12,591.82

Step by Step Solution

1. Step 1: Write the proportion equation
   14,728.69 : 20,340.03 = 12,591.82 : x
2. Step 2: Convert to fraction form
   14,728.69/20,340.03 = 12,591.82/x
3. Step 3: Cross multiply
   14,728.69x = 20,340.03 × 12,591.82
4. Step 4: Simplify right side
   14,728.69x = 256,117,996.55
5. Step 5: Solve for x
   x = 256,117,996.55/14,728.69
6. Step 6: Final answer
   x = 17,389.05