Finding the Fourth Proportional to 21,145.08, 29,180.12 and 12,192.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,145.08 : 29,180.12 = 12,192.52 : x
2. Step 2: Convert to fraction form
   21,145.08/29,180.12 = 12,192.52/x
3. Step 3: Cross multiply
   21,145.08x = 29,180.12 × 12,192.52
4. Step 4: Simplify right side
   21,145.08x = 355,779,196.70
5. Step 5: Solve for x
   x = 355,779,196.70/21,145.08
6. Step 6: Final answer
   x = 16,825.63