Finding the Fourth Proportional to 39,948.21, 55,128.72 and 22,043.23

Step by Step Solution

1. Step 1: Write the proportion equation
   39,948.21 : 55,128.72 = 22,043.23 : x
2. Step 2: Convert to fraction form
   39,948.21/55,128.72 = 22,043.23/x
3. Step 3: Cross multiply
   39,948.21x = 55,128.72 × 22,043.23
4. Step 4: Simplify right side
   39,948.21x = 1,215,215,054.57
5. Step 5: Solve for x
   x = 1,215,215,054.57/39,948.21
6. Step 6: Final answer
   x = 30,419.76