Finding the Fourth Proportional to 21,930.27, 30,264.09 and 12,370.61

Step by Step Solution

1. Step 1: Write the proportion equation
   21,930.27 : 30,264.09 = 12,370.61 : x
2. Step 2: Convert to fraction form
   21,930.27/30,264.09 = 12,370.61/x
3. Step 3: Cross multiply
   21,930.27x = 30,264.09 × 12,370.61
4. Step 4: Simplify right side
   21,930.27x = 374,385,103.07
5. Step 5: Solve for x
   x = 374,385,103.07/21,930.27
6. Step 6: Final answer
   x = 17,071.61