Finding the Fourth Proportional to 13,789.92, 20,685.12 and 5,997.60

Step by Step Solution

1. Step 1: Write the proportion equation
   13,789.92 : 20,685.12 = 5,997.60 : x
2. Step 2: Convert to fraction form
   13,789.92/20,685.12 = 5,997.60/x
3. Step 3: Cross multiply
   13,789.92x = 20,685.12 × 5,997.60
4. Step 4: Simplify right side
   13,789.92x = 124,061,075.71
5. Step 5: Solve for x
   x = 124,061,075.71/13,789.92
6. Step 6: Final answer
   x = 8,996.50