Finding the Fourth Proportional to 1,057.28, 1,459.05 and 591.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,057.28 : 1,459.05 = 591.53 : x
2. Step 2: Convert to fraction form
   1,057.28/1,459.05 = 591.53/x
3. Step 3: Cross multiply
   1,057.28x = 1,459.05 × 591.53
4. Step 4: Simplify right side
   1,057.28x = 863,068.89
5. Step 5: Solve for x
   x = 863,068.89/1,057.28
6. Step 6: Final answer
   x = 816.31