Finding the Fourth Proportional to 21,150.02, 31,727.96 and 7,111.15

Step by Step Solution

1. Step 1: Write the proportion equation
   21,150.02 : 31,727.96 = 7,111.15 : x
2. Step 2: Convert to fraction form
   21,150.02/31,727.96 = 7,111.15/x
3. Step 3: Cross multiply
   21,150.02x = 31,727.96 × 7,111.15
4. Step 4: Simplify right side
   21,150.02x = 225,622,282.75
5. Step 5: Solve for x
   x = 225,622,282.75/21,150.02
6. Step 6: Final answer
   x = 10,667.71