Finding the Fourth Proportional to 1,057.46, 1,459.34 and 591.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,057.46 : 1,459.34 = 591.71 : x
2. Step 2: Convert to fraction form
   1,057.46/1,459.34 = 591.71/x
3. Step 3: Cross multiply
   1,057.46x = 1,459.34 × 591.71
4. Step 4: Simplify right side
   1,057.46x = 863,507.55
5. Step 5: Solve for x
   x = 863,507.55/1,057.46
6. Step 6: Final answer
   x = 816.59