Finding the Fourth Proportional to 31,974.72, 44,144.04 and 28,428.12

Step by Step Solution

1. Step 1: Write the proportion equation
   31,974.72 : 44,144.04 = 28,428.12 : x
2. Step 2: Convert to fraction form
   31,974.72/44,144.04 = 28,428.12/x
3. Step 3: Cross multiply
   31,974.72x = 44,144.04 × 28,428.12
4. Step 4: Simplify right side
   31,974.72x = 1,254,932,066.40
5. Step 5: Solve for x
   x = 1,254,932,066.40/31,974.72
6. Step 6: Final answer
   x = 39,247.63