Finding the Fourth Proportional to 21,241.34, 29,314.59 and 12,743.83

Step by Step Solution

1. Step 1: Write the proportion equation
   21,241.34 : 29,314.59 = 12,743.83 : x
2. Step 2: Convert to fraction form
   21,241.34/29,314.59 = 12,743.83/x
3. Step 3: Cross multiply
   21,241.34x = 29,314.59 × 12,743.83
4. Step 4: Simplify right side
   21,241.34x = 373,580,151.48
5. Step 5: Solve for x
   x = 373,580,151.48/21,241.34
6. Step 6: Final answer
   x = 17,587.41