Finding the Fourth Proportional to 21,152.61, 29,186.90 and 12,073.82

Step by Step Solution

1. Step 1: Write the proportion equation
   21,152.61 : 29,186.90 = 12,073.82 : x
2. Step 2: Convert to fraction form
   21,152.61/29,186.90 = 12,073.82/x
3. Step 3: Cross multiply
   21,152.61x = 29,186.90 × 12,073.82
4. Step 4: Simplify right side
   21,152.61x = 352,397,389.56
5. Step 5: Solve for x
   x = 352,397,389.56/21,152.61
6. Step 6: Final answer
   x = 16,659.76