Finding the Fourth Proportional to 51,679.78, 71,309.52 and 30,456.16

Step by Step Solution

1. Step 1: Write the proportion equation
   51,679.78 : 71,309.52 = 30,456.16 : x
2. Step 2: Convert to fraction form
   51,679.78/71,309.52 = 30,456.16/x
3. Step 3: Cross multiply
   51,679.78x = 71,309.52 × 30,456.16
4. Step 4: Simplify right side
   51,679.78x = 2,171,814,150.64
5. Step 5: Solve for x
   x = 2,171,814,150.64/51,679.78
6. Step 6: Final answer
   x = 42,024.45