Finding the Fourth Proportional to 1,527.72, 2,107.89 and 864.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,527.72 : 2,107.89 = 864.48 : x
2. Step 2: Convert to fraction form
   1,527.72/2,107.89 = 864.48/x
3. Step 3: Cross multiply
   1,527.72x = 2,107.89 × 864.48
4. Step 4: Simplify right side
   1,527.72x = 1,822,228.75
5. Step 5: Solve for x
   x = 1,822,228.75/1,527.72
6. Step 6: Final answer
   x = 1,192.78