Finding the Fourth Proportional to 21,555.89, 29,733.17 and 13,895.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,555.89 : 29,733.17 = 13,895.72 : x
2. Step 2: Convert to fraction form
   21,555.89/29,733.17 = 13,895.72/x
3. Step 3: Cross multiply
   21,555.89x = 29,733.17 × 13,895.72
4. Step 4: Simplify right side
   21,555.89x = 413,163,586.89
5. Step 5: Solve for x
   x = 413,163,586.89/21,555.89
6. Step 6: Final answer
   x = 19,167.09