Finding the Fourth Proportional to 21,035.56, 29,019.86 and 13,374.73

Step by Step Solution

1. Step 1: Write the proportion equation
   21,035.56 : 29,019.86 = 13,374.73 : x
2. Step 2: Convert to fraction form
   21,035.56/29,019.86 = 13,374.73/x
3. Step 3: Cross multiply
   21,035.56x = 29,019.86 × 13,374.73
4. Step 4: Simplify right side
   21,035.56x = 388,132,580.16
5. Step 5: Solve for x
   x = 388,132,580.16/21,035.56
6. Step 6: Final answer
   x = 18,451.26