Finding the Fourth Proportional to 1,151.02, 1,588.61 and 678.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,151.02 : 1,588.61 = 678.88 : x
2. Step 2: Convert to fraction form
   1,151.02/1,588.61 = 678.88/x
3. Step 3: Cross multiply
   1,151.02x = 1,588.61 × 678.88
4. Step 4: Simplify right side
   1,151.02x = 1,078,475.56
5. Step 5: Solve for x
   x = 1,078,475.56/1,151.02
6. Step 6: Final answer
   x = 936.97