Finding the Fourth Proportional to 50,031.28, 69,035.52 and 28,807.12

Step by Step Solution

1. Step 1: Write the proportion equation
   50,031.28 : 69,035.52 = 28,807.12 : x
2. Step 2: Convert to fraction form
   50,031.28/69,035.52 = 28,807.12/x
3. Step 3: Cross multiply
   50,031.28x = 69,035.52 × 28,807.12
4. Step 4: Simplify right side
   50,031.28x = 1,988,714,508.90
5. Step 5: Solve for x
   x = 1,988,714,508.90/50,031.28
6. Step 6: Final answer
   x = 39,749.42