Finding the Fourth Proportional to 21,514.70, 29,683.86 and 13,019.96

Step by Step Solution

1. Step 1: Write the proportion equation
   21,514.70 : 29,683.86 = 13,019.96 : x
2. Step 2: Convert to fraction form
   21,514.70/29,683.86 = 13,019.96/x
3. Step 3: Cross multiply
   21,514.70x = 29,683.86 × 13,019.96
4. Step 4: Simplify right side
   21,514.70x = 386,482,669.85
5. Step 5: Solve for x
   x = 386,482,669.85/21,514.70
6. Step 6: Final answer
   x = 17,963.66