Finding the Fourth Proportional to 21,862.30, 30,169.31 and 12,302.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,862.30 : 30,169.31 = 12,302.72 : x
2. Step 2: Convert to fraction form
   21,862.30/30,169.31 = 12,302.72/x
3. Step 3: Cross multiply
   21,862.30x = 30,169.31 × 12,302.72
4. Step 4: Simplify right side
   21,862.30x = 371,164,573.52
5. Step 5: Solve for x
   x = 371,164,573.52/21,862.30
6. Step 6: Final answer
   x = 16,977.38