Finding the Fourth Proportional to 21,555.56, 29,746.38 and 12,124.12

Step by Step Solution

1. Step 1: Write the proportion equation
   21,555.56 : 29,746.38 = 12,124.12 : x
2. Step 2: Convert to fraction form
   21,555.56/29,746.38 = 12,124.12/x
3. Step 3: Cross multiply
   21,555.56x = 29,746.38 × 12,124.12
4. Step 4: Simplify right side
   21,555.56x = 360,648,680.69
5. Step 5: Solve for x
   x = 360,648,680.69/21,555.56
6. Step 6: Final answer
   x = 16,731.12