Finding the Fourth Proportional to 39,904.38, 55,066.35 and 21,754.71

Step by Step Solution

1. Step 1: Write the proportion equation
   39,904.38 : 55,066.35 = 21,754.71 : x
2. Step 2: Convert to fraction form
   39,904.38/55,066.35 = 21,754.71/x
3. Step 3: Cross multiply
   39,904.38x = 55,066.35 × 21,754.71
4. Step 4: Simplify right side
   39,904.38x = 1,197,952,475.01
5. Step 5: Solve for x
   x = 1,197,952,475.01/39,904.38
6. Step 6: Final answer
   x = 30,020.58