Finding the Fourth Proportional to 21,543.34, 29,732.57 and 12,113.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,543.34 : 29,732.57 = 12,113.72 : x
2. Step 2: Convert to fraction form
   21,543.34/29,732.57 = 12,113.72/x
3. Step 3: Cross multiply
   21,543.34x = 29,732.57 × 12,113.72
4. Step 4: Simplify right side
   21,543.34x = 360,172,027.86
5. Step 5: Solve for x
   x = 360,172,027.86/21,543.34
6. Step 6: Final answer
   x = 16,718.49