Finding the Fourth Proportional to 129,680.72, 194,443.20 and 50,700.84

Step by Step Solution

1. Step 1: Write the proportion equation
   129,680.72 : 194,443.20 = 50,700.84 : x
2. Step 2: Convert to fraction form
   129,680.72/194,443.20 = 50,700.84/x
3. Step 3: Cross multiply
   129,680.72x = 194,443.20 × 50,700.84
4. Step 4: Simplify right side
   129,680.72x = 9,858,433,572.29
5. Step 5: Solve for x
   x = 9,858,433,572.29/129,680.72
6. Step 6: Final answer
   x = 76,020.81