Finding the Fourth Proportional to 51,672.96, 71,310.72 and 30,451.20

Step by Step Solution

1. Step 1: Write the proportion equation
   51,672.96 : 71,310.72 = 30,451.20 : x
2. Step 2: Convert to fraction form
   51,672.96/71,310.72 = 30,451.20/x
3. Step 3: Cross multiply
   51,672.96x = 71,310.72 × 30,451.20
4. Step 4: Simplify right side
   51,672.96x = 2,171,496,996.86
5. Step 5: Solve for x
   x = 2,171,496,996.86/51,672.96
6. Step 6: Final answer
   x = 42,023.86