Finding the Fourth Proportional to 5,120.46, 7,680.83 and 1,422.96

Step by Step Solution

1. Step 1: Write the proportion equation
   5,120.46 : 7,680.83 = 1,422.96 : x
2. Step 2: Convert to fraction form
   5,120.46/7,680.83 = 1,422.96/x
3. Step 3: Cross multiply
   5,120.46x = 7,680.83 × 1,422.96
4. Step 4: Simplify right side
   5,120.46x = 10,929,513.86
5. Step 5: Solve for x
   x = 10,929,513.86/5,120.46
6. Step 6: Final answer
   x = 2,134.48