Finding the Fourth Proportional to 1,530.72, 2,112.30 and 858.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,530.72 : 2,112.30 = 858.54 : x
2. Step 2: Convert to fraction form
   1,530.72/2,112.30 = 858.54/x
3. Step 3: Cross multiply
   1,530.72x = 2,112.30 × 858.54
4. Step 4: Simplify right side
   1,530.72x = 1,813,494.04
5. Step 5: Solve for x
   x = 1,813,494.04/1,530.72
6. Step 6: Final answer
   x = 1,184.73