Finding the Fourth Proportional to 1,150.93, 1,588.34 and 678.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,150.93 : 1,588.34 = 678.87 : x
2. Step 2: Convert to fraction form
   1,150.93/1,588.34 = 678.87/x
3. Step 3: Cross multiply
   1,150.93x = 1,588.34 × 678.87
4. Step 4: Simplify right side
   1,150.93x = 1,078,276.38
5. Step 5: Solve for x
   x = 1,078,276.38/1,150.93
6. Step 6: Final answer
   x = 936.87