Finding the Fourth Proportional to 1,528.58, 2,293.15 and 706.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,528.58 : 2,293.15 = 706.31 : x
2. Step 2: Convert to fraction form
   1,528.58/2,293.15 = 706.31/x
3. Step 3: Cross multiply
   1,528.58x = 2,293.15 × 706.31
4. Step 4: Simplify right side
   1,528.58x = 1,619,661.54
5. Step 5: Solve for x
   x = 1,619,661.54/1,528.58
6. Step 6: Final answer
   x = 1,059.59