Finding the Fourth Proportional to 1,527.30, 2,107.71 and 828.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,527.30 : 2,107.71 = 828.69 : x
2. Step 2: Convert to fraction form
   1,527.30/2,107.71 = 828.69/x
3. Step 3: Cross multiply
   1,527.30x = 2,107.71 × 828.69
4. Step 4: Simplify right side
   1,527.30x = 1,746,638.20
5. Step 5: Solve for x
   x = 1,746,638.20/1,527.30
6. Step 6: Final answer
   x = 1,143.61