Finding the Fourth Proportional to 21,010.29, 31,506.53 and 7,853.46

Step by Step Solution

1. Step 1: Write the proportion equation
   21,010.29 : 31,506.53 = 7,853.46 : x
2. Step 2: Convert to fraction form
   21,010.29/31,506.53 = 7,853.46/x
3. Step 3: Cross multiply
   21,010.29x = 31,506.53 × 7,853.46
4. Step 4: Simplify right side
   21,010.29x = 247,435,233.83
5. Step 5: Solve for x
   x = 247,435,233.83/21,010.29
6. Step 6: Final answer
   x = 11,776.86