Finding the Fourth Proportional to 20,914.37, 31,371.59 and 8,903.42

Step by Step Solution

1. Step 1: Write the proportion equation
   20,914.37 : 31,371.59 = 8,903.42 : x
2. Step 2: Convert to fraction form
   20,914.37/31,371.59 = 8,903.42/x
3. Step 3: Cross multiply
   20,914.37x = 31,371.59 × 8,903.42
4. Step 4: Simplify right side
   20,914.37x = 279,314,374.80
5. Step 5: Solve for x
   x = 279,314,374.80/20,914.37
6. Step 6: Final answer
   x = 13,355.14