Finding the Fourth Proportional to 21,589.02, 29,792.91 and 12,516.15

Step by Step Solution

1. Step 1: Write the proportion equation
   21,589.02 : 29,792.91 = 12,516.15 : x
2. Step 2: Convert to fraction form
   21,589.02/29,792.91 = 12,516.15/x
3. Step 3: Cross multiply
   21,589.02x = 29,792.91 × 12,516.15
4. Step 4: Simplify right side
   21,589.02x = 372,892,530.50
5. Step 5: Solve for x
   x = 372,892,530.50/21,589.02
6. Step 6: Final answer
   x = 17,272.32