Finding the Fourth Proportional to 12,721.83, 17,556.18 and 7,056.18

Step by Step Solution

1. Step 1: Write the proportion equation
   12,721.83 : 17,556.18 = 7,056.18 : x
2. Step 2: Convert to fraction form
   12,721.83/17,556.18 = 7,056.18/x
3. Step 3: Cross multiply
   12,721.83x = 17,556.18 × 7,056.18
4. Step 4: Simplify right side
   12,721.83x = 123,879,539.73
5. Step 5: Solve for x
   x = 123,879,539.73/12,721.83
6. Step 6: Final answer
   x = 9,737.56