Finding the Fourth Proportional to 1,086.78, 1,627.39 and 599.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.78 : 1,627.39 = 599.29 : x
2. Step 2: Convert to fraction form
   1,086.78/1,627.39 = 599.29/x
3. Step 3: Cross multiply
   1,086.78x = 1,627.39 × 599.29
4. Step 4: Simplify right side
   1,086.78x = 975,278.55
5. Step 5: Solve for x
   x = 975,278.55/1,086.78
6. Step 6: Final answer
   x = 897.40