Finding the Fourth Proportional to 1,057.09, 1,458.83 and 591.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,057.09 : 1,458.83 = 591.34 : x
2. Step 2: Convert to fraction form
   1,057.09/1,458.83 = 591.34/x
3. Step 3: Cross multiply
   1,057.09x = 1,458.83 × 591.34
4. Step 4: Simplify right side
   1,057.09x = 862,654.28
5. Step 5: Solve for x
   x = 862,654.28/1,057.09
6. Step 6: Final answer
   x = 816.07