Finding the Fourth Proportional to 1,150.53, 1,588.28 and 678.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,150.53 : 1,588.28 = 678.28 : x
2. Step 2: Convert to fraction form
   1,150.53/1,588.28 = 678.28/x
3. Step 3: Cross multiply
   1,150.53x = 1,588.28 × 678.28
4. Step 4: Simplify right side
   1,150.53x = 1,077,295.17
5. Step 5: Solve for x
   x = 1,077,295.17/1,150.53
6. Step 6: Final answer
   x = 936.34