Finding the Fourth Proportional to 1,913.28, 2,871.04 and 1,092.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,913.28 : 2,871.04 = 1,092.72 : x
2. Step 2: Convert to fraction form
   1,913.28/2,871.04 = 1,092.72/x
3. Step 3: Cross multiply
   1,913.28x = 2,871.04 × 1,092.72
4. Step 4: Simplify right side
   1,913.28x = 3,137,242.83
5. Step 5: Solve for x
   x = 3,137,242.83/1,913.28
6. Step 6: Final answer
   x = 1,639.72