Finding the Fourth Proportional to 21,771.72, 30,045.33 and 12,340.08

Step by Step Solution

1. Step 1: Write the proportion equation
   21,771.72 : 30,045.33 = 12,340.08 : x
2. Step 2: Convert to fraction form
   21,771.72/30,045.33 = 12,340.08/x
3. Step 3: Cross multiply
   21,771.72x = 30,045.33 × 12,340.08
4. Step 4: Simplify right side
   21,771.72x = 370,761,775.83
5. Step 5: Solve for x
   x = 370,761,775.83/21,771.72
6. Step 6: Final answer
   x = 17,029.51