Finding the Fourth Proportional to 51,218.72, 76,725.60 and 40,706.48

Step by Step Solution

1. Step 1: Write the proportion equation
   51,218.72 : 76,725.60 = 40,706.48 : x
2. Step 2: Convert to fraction form
   51,218.72/76,725.60 = 40,706.48/x
3. Step 3: Cross multiply
   51,218.72x = 76,725.60 × 40,706.48
4. Step 4: Simplify right side
   51,218.72x = 3,123,229,101.89
5. Step 5: Solve for x
   x = 3,123,229,101.89/51,218.72
6. Step 6: Final answer
   x = 60,978.27