Finding the Fourth Proportional to 858.72, 1,287.72 and 735.24

Step by Step Solution

1. Step 1: Write the proportion equation
   858.72 : 1,287.72 = 735.24 : x
2. Step 2: Convert to fraction form
   858.72/1,287.72 = 735.24/x
3. Step 3: Cross multiply
   858.72x = 1,287.72 × 735.24
4. Step 4: Simplify right side
   858.72x = 946,783.25
5. Step 5: Solve for x
   x = 946,783.25/858.72
6. Step 6: Final answer
   x = 1,102.55