Finding the Fourth Proportional to 50,680.64, 69,938.18 and 28,020.58

Step by Step Solution

1. Step 1: Write the proportion equation
   50,680.64 : 69,938.18 = 28,020.58 : x
2. Step 2: Convert to fraction form
   50,680.64/69,938.18 = 28,020.58/x
3. Step 3: Cross multiply
   50,680.64x = 69,938.18 × 28,020.58
4. Step 4: Simplify right side
   50,680.64x = 1,959,708,708.89
5. Step 5: Solve for x
   x = 1,959,708,708.89/50,680.64
6. Step 6: Final answer
   x = 38,667.80