Finding the Fourth Proportional to 1,057.02, 1,458.71 and 591.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,057.02 : 1,458.71 = 591.30 : x
2. Step 2: Convert to fraction form
   1,057.02/1,458.71 = 591.30/x
3. Step 3: Cross multiply
   1,057.02x = 1,458.71 × 591.30
4. Step 4: Simplify right side
   1,057.02x = 862,535.22
5. Step 5: Solve for x
   x = 862,535.22/1,057.02
6. Step 6: Final answer
   x = 816.01