Finding the Fourth Proportional to 51,047.72, 70,429.60 and 30,898.16

Step by Step Solution

1. Step 1: Write the proportion equation
   51,047.72 : 70,429.60 = 30,898.16 : x
2. Step 2: Convert to fraction form
   51,047.72/70,429.60 = 30,898.16/x
3. Step 3: Cross multiply
   51,047.72x = 70,429.60 × 30,898.16
4. Step 4: Simplify right side
   51,047.72x = 2,176,145,049.54
5. Step 5: Solve for x
   x = 2,176,145,049.54/51,047.72
6. Step 6: Final answer
   x = 42,629.62