Finding the Fourth Proportional to 21,770.22, 30,049.74 and 12,345.06

Step by Step Solution

1. Step 1: Write the proportion equation
   21,770.22 : 30,049.74 = 12,345.06 : x
2. Step 2: Convert to fraction form
   21,770.22/30,049.74 = 12,345.06/x
3. Step 3: Cross multiply
   21,770.22x = 30,049.74 × 12,345.06
4. Step 4: Simplify right side
   21,770.22x = 370,965,843.28
5. Step 5: Solve for x
   x = 370,965,843.28/21,770.22
6. Step 6: Final answer
   x = 17,040.06