Finding the Fourth Proportional to 21,073.27, 29,081.68 and 12,580.32

Step by Step Solution

1. Step 1: Write the proportion equation
   21,073.27 : 29,081.68 = 12,580.32 : x
2. Step 2: Convert to fraction form
   21,073.27/29,081.68 = 12,580.32/x
3. Step 3: Cross multiply
   21,073.27x = 29,081.68 × 12,580.32
4. Step 4: Simplify right side
   21,073.27x = 365,856,632.23
5. Step 5: Solve for x
   x = 365,856,632.23/21,073.27
6. Step 6: Final answer
   x = 17,361.17