Finding the Fourth Proportional to 21,016.01, 31,531.55 and 9,003.12

Step by Step Solution

1. Step 1: Write the proportion equation
   21,016.01 : 31,531.55 = 9,003.12 : x
2. Step 2: Convert to fraction form
   21,016.01/31,531.55 = 9,003.12/x
3. Step 3: Cross multiply
   21,016.01x = 31,531.55 × 9,003.12
4. Step 4: Simplify right side
   21,016.01x = 283,882,362.25
5. Step 5: Solve for x
   x = 283,882,362.25/21,016.01
6. Step 6: Final answer
   x = 13,507.91