Finding the Fourth Proportional to 1,150.30, 1,587.72 and 678.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,150.30 : 1,587.72 = 678.25 : x
2. Step 2: Convert to fraction form
   1,150.30/1,587.72 = 678.25/x
3. Step 3: Cross multiply
   1,150.30x = 1,587.72 × 678.25
4. Step 4: Simplify right side
   1,150.30x = 1,076,871.09
5. Step 5: Solve for x
   x = 1,076,871.09/1,150.30
6. Step 6: Final answer
   x = 936.17