Finding the Fourth Proportional to 21,702.32, 29,949.76 and 12,141.89

Step by Step Solution

1. Step 1: Write the proportion equation
   21,702.32 : 29,949.76 = 12,141.89 : x
2. Step 2: Convert to fraction form
   21,702.32/29,949.76 = 12,141.89/x
3. Step 3: Cross multiply
   21,702.32x = 29,949.76 × 12,141.89
4. Step 4: Simplify right side
   21,702.32x = 363,646,691.45
5. Step 5: Solve for x
   x = 363,646,691.45/21,702.32
6. Step 6: Final answer
   x = 16,756.12