Finding the Fourth Proportional to 51,143.39, 76,723.34 and 15,123.50

Step by Step Solution

1. Step 1: Write the proportion equation
   51,143.39 : 76,723.34 = 15,123.50 : x
2. Step 2: Convert to fraction form
   51,143.39/76,723.34 = 15,123.50/x
3. Step 3: Cross multiply
   51,143.39x = 76,723.34 × 15,123.50
4. Step 4: Simplify right side
   51,143.39x = 1,160,325,086.68
5. Step 5: Solve for x
   x = 1,160,325,086.68/51,143.39
6. Step 6: Final answer
   x = 22,687.69