Finding the Fourth Proportional to 1,913.69, 2,864.96 and 1,422.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,913.69 : 2,864.96 = 1,422.28 : x
2. Step 2: Convert to fraction form
   1,913.69/2,864.96 = 1,422.28/x
3. Step 3: Cross multiply
   1,913.69x = 2,864.96 × 1,422.28
4. Step 4: Simplify right side
   1,913.69x = 4,074,778.86
5. Step 5: Solve for x
   x = 4,074,778.86/1,913.69
6. Step 6: Final answer
   x = 2,129.28