Finding the Fourth Proportional to 21,004.66, 31,503.32 and 7,854.31

Step by Step Solution

1. Step 1: Write the proportion equation
   21,004.66 : 31,503.32 = 7,854.31 : x
2. Step 2: Convert to fraction form
   21,004.66/31,503.32 = 7,854.31/x
3. Step 3: Cross multiply
   21,004.66x = 31,503.32 × 7,854.31
4. Step 4: Simplify right side
   21,004.66x = 247,436,644.52
5. Step 5: Solve for x
   x = 247,436,644.52/21,004.66
6. Step 6: Final answer
   x = 11,780.09