Finding the Fourth Proportional to 39,939.32, 55,076.88 and 30,983.55

Step by Step Solution

1. Step 1: Write the proportion equation
   39,939.32 : 55,076.88 = 30,983.55 : x
2. Step 2: Convert to fraction form
   39,939.32/55,076.88 = 30,983.55/x
3. Step 3: Cross multiply
   39,939.32x = 55,076.88 × 30,983.55
4. Step 4: Simplify right side
   39,939.32x = 1,706,477,265.32
5. Step 5: Solve for x
   x = 1,706,477,265.32/39,939.32
6. Step 6: Final answer
   x = 42,726.75