Finding the Fourth Proportional to 22,139.32, 33,215.42 and 7,146.11

Step by Step Solution

1. Step 1: Write the proportion equation
   22,139.32 : 33,215.42 = 7,146.11 : x
2. Step 2: Convert to fraction form
   22,139.32/33,215.42 = 7,146.11/x
3. Step 3: Cross multiply
   22,139.32x = 33,215.42 × 7,146.11
4. Step 4: Simplify right side
   22,139.32x = 237,361,145.92
5. Step 5: Solve for x
   x = 237,361,145.92/22,139.32
6. Step 6: Final answer
   x = 10,721.25