Finding the Fourth Proportional to 21,260.42, 29,335.59 and 12,307.49

Step by Step Solution

1. Step 1: Write the proportion equation
   21,260.42 : 29,335.59 = 12,307.49 : x
2. Step 2: Convert to fraction form
   21,260.42/29,335.59 = 12,307.49/x
3. Step 3: Cross multiply
   21,260.42x = 29,335.59 × 12,307.49
4. Step 4: Simplify right side
   21,260.42x = 361,047,333.89
5. Step 5: Solve for x
   x = 361,047,333.89/21,260.42
6. Step 6: Final answer
   x = 16,982.14