Finding the Fourth Proportional to 21,734.88, 30,012.52 and 13,791.20

Step by Step Solution

1. Step 1: Write the proportion equation
   21,734.88 : 30,012.52 = 13,791.20 : x
2. Step 2: Convert to fraction form
   21,734.88/30,012.52 = 13,791.20/x
3. Step 3: Cross multiply
   21,734.88x = 30,012.52 × 13,791.20
4. Step 4: Simplify right side
   21,734.88x = 413,908,665.82
5. Step 5: Solve for x
   x = 413,908,665.82/21,734.88
6. Step 6: Final answer
   x = 19,043.52