Finding the Fourth Proportional to 859.69, 1,185.90 and 742.15

Step by Step Solution

1. Step 1: Write the proportion equation
   859.69 : 1,185.90 = 742.15 : x
2. Step 2: Convert to fraction form
   859.69/1,185.90 = 742.15/x
3. Step 3: Cross multiply
   859.69x = 1,185.90 × 742.15
4. Step 4: Simplify right side
   859.69x = 880,109.76
5. Step 5: Solve for x
   x = 880,109.76/859.69
6. Step 6: Final answer
   x = 1,023.76