Finding the Fourth Proportional to 21,187.34, 31,760.33 and 10,091.06

Step by Step Solution

1. Step 1: Write the proportion equation
   21,187.34 : 31,760.33 = 10,091.06 : x
2. Step 2: Convert to fraction form
   21,187.34/31,760.33 = 10,091.06/x
3. Step 3: Cross multiply
   21,187.34x = 31,760.33 × 10,091.06
4. Step 4: Simplify right side
   21,187.34x = 320,495,186.39
5. Step 5: Solve for x
   x = 320,495,186.39/21,187.34
6. Step 6: Final answer
   x = 15,126.73