Finding the Fourth Proportional to 1,150.22, 1,587.29 and 678.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,150.22 : 1,587.29 = 678.42 : x
2. Step 2: Convert to fraction form
   1,150.22/1,587.29 = 678.42/x
3. Step 3: Cross multiply
   1,150.22x = 1,587.29 × 678.42
4. Step 4: Simplify right side
   1,150.22x = 1,076,849.28
5. Step 5: Solve for x
   x = 1,076,849.28/1,150.22
6. Step 6: Final answer
   x = 936.21