Finding the Fourth Proportional to 51,122.72, 76,693.76 and 19,956

Step by Step Solution

1. Step 1: Write the proportion equation
   51,122.72 : 76,693.76 = 19,956 : x
2. Step 2: Convert to fraction form
   51,122.72/76,693.76 = 19,956/x
3. Step 3: Cross multiply
   51,122.72x = 76,693.76 × 19,956
4. Step 4: Simplify right side
   51,122.72x = 1,530,500,674.56
5. Step 5: Solve for x
   x = 1,530,500,674.56/51,122.72
6. Step 6: Final answer
   x = 29,937.78