Finding the Fourth Proportional to 1,528.72, 2,282.72 and 1,200.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,528.72 : 2,282.72 = 1,200.40 : x
2. Step 2: Convert to fraction form
   1,528.72/2,282.72 = 1,200.40/x
3. Step 3: Cross multiply
   1,528.72x = 2,282.72 × 1,200.40
4. Step 4: Simplify right side
   1,528.72x = 2,740,177.09
5. Step 5: Solve for x
   x = 2,740,177.09/1,528.72
6. Step 6: Final answer
   x = 1,792.46