Finding the Fourth Proportional to 19,728.83, 29,583.98 and 7,240.15

Step by Step Solution

1. Step 1: Write the proportion equation
   19,728.83 : 29,583.98 = 7,240.15 : x
2. Step 2: Convert to fraction form
   19,728.83/29,583.98 = 7,240.15/x
3. Step 3: Cross multiply
   19,728.83x = 29,583.98 × 7,240.15
4. Step 4: Simplify right side
   19,728.83x = 214,192,452.80
5. Step 5: Solve for x
   x = 214,192,452.80/19,728.83
6. Step 6: Final answer
   x = 10,856.82