Finding the Fourth Proportional to 21,719.82, 29,976.58 and 13,762.79

Step by Step Solution

1. Step 1: Write the proportion equation
   21,719.82 : 29,976.58 = 13,762.79 : x
2. Step 2: Convert to fraction form
   21,719.82/29,976.58 = 13,762.79/x
3. Step 3: Cross multiply
   21,719.82x = 29,976.58 × 13,762.79
4. Step 4: Simplify right side
   21,719.82x = 412,561,375.46
5. Step 5: Solve for x
   x = 412,561,375.46/21,719.82
6. Step 6: Final answer
   x = 18,994.70