Finding the Fourth Proportional to 21,748.82, 30,002.48 and 13,778.42

Step by Step Solution

1. Step 1: Write the proportion equation
   21,748.82 : 30,002.48 = 13,778.42 : x
2. Step 2: Convert to fraction form
   21,748.82/30,002.48 = 13,778.42/x
3. Step 3: Cross multiply
   21,748.82x = 30,002.48 × 13,778.42
4. Step 4: Simplify right side
   21,748.82x = 413,386,551.58
5. Step 5: Solve for x
   x = 413,386,551.58/21,748.82
6. Step 6: Final answer
   x = 19,007.31