Finding the Fourth Proportional to 40,425.48, 55,383.15 and 38,910.36

Step by Step Solution

1. Step 1: Write the proportion equation
   40,425.48 : 55,383.15 = 38,910.36 : x
2. Step 2: Convert to fraction form
   40,425.48/55,383.15 = 38,910.36/x
3. Step 3: Cross multiply
   40,425.48x = 55,383.15 × 38,910.36
4. Step 4: Simplify right side
   40,425.48x = 2,154,978,304.43
5. Step 5: Solve for x
   x = 2,154,978,304.43/40,425.48
6. Step 6: Final answer
   x = 53,307.43