Finding the Fourth Proportional to 1,150.34, 1,587.37 and 678.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,150.34 : 1,587.37 = 678.16 : x
2. Step 2: Convert to fraction form
   1,150.34/1,587.37 = 678.16/x
3. Step 3: Cross multiply
   1,150.34x = 1,587.37 × 678.16
4. Step 4: Simplify right side
   1,150.34x = 1,076,487.45
5. Step 5: Solve for x
   x = 1,076,487.45/1,150.34
6. Step 6: Final answer
   x = 935.80