Finding the Fourth Proportional to 19,822.73, 29,739.05 and 13,990.73

Step by Step Solution

1. Step 1: Write the proportion equation
   19,822.73 : 29,739.05 = 13,990.73 : x
2. Step 2: Convert to fraction form
   19,822.73/29,739.05 = 13,990.73/x
3. Step 3: Cross multiply
   19,822.73x = 29,739.05 × 13,990.73
4. Step 4: Simplify right side
   19,822.73x = 416,071,019.01
5. Step 5: Solve for x
   x = 416,071,019.01/19,822.73
6. Step 6: Final answer
   x = 20,989.59