Finding the Fourth Proportional to 21,737.31, 30,002.18 and 13,242.24

Step by Step Solution

1. Step 1: Write the proportion equation
   21,737.31 : 30,002.18 = 13,242.24 : x
2. Step 2: Convert to fraction form
   21,737.31/30,002.18 = 13,242.24/x
3. Step 3: Cross multiply
   21,737.31x = 30,002.18 × 13,242.24
4. Step 4: Simplify right side
   21,737.31x = 397,296,001.87
5. Step 5: Solve for x
   x = 397,296,001.87/21,737.31
6. Step 6: Final answer
   x = 18,277.15