Finding the Fourth Proportional to 1,082.78, 1,621.40 and 595.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,082.78 : 1,621.40 = 595.29 : x
2. Step 2: Convert to fraction form
   1,082.78/1,621.40 = 595.29/x
3. Step 3: Cross multiply
   1,082.78x = 1,621.40 × 595.29
4. Step 4: Simplify right side
   1,082.78x = 965,200.23
5. Step 5: Solve for x
   x = 965,200.23/1,082.78
6. Step 6: Final answer
   x = 891.41