Finding the Fourth Proportional to 1,152.02, 1,589.79 and 628.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,152.02 : 1,589.79 = 628.05 : x
2. Step 2: Convert to fraction form
   1,152.02/1,589.79 = 628.05/x
3. Step 3: Cross multiply
   1,152.02x = 1,589.79 × 628.05
4. Step 4: Simplify right side
   1,152.02x = 998,467.61
5. Step 5: Solve for x
   x = 998,467.61/1,152.02
6. Step 6: Final answer
   x = 866.71