Finding the Fourth Proportional to 21,300.15, 29,392.09 and 12,350.67

Step by Step Solution

1. Step 1: Write the proportion equation
   21,300.15 : 29,392.09 = 12,350.67 : x
2. Step 2: Convert to fraction form
   21,300.15/29,392.09 = 12,350.67/x
3. Step 3: Cross multiply
   21,300.15x = 29,392.09 × 12,350.67
4. Step 4: Simplify right side
   21,300.15x = 363,012,004.20
5. Step 5: Solve for x
   x = 363,012,004.20/21,300.15
6. Step 6: Final answer
   x = 17,042.70