Finding the Fourth Proportional to 1,057.54, 1,459.38 and 591.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,057.54 : 1,459.38 = 591.88 : x
2. Step 2: Convert to fraction form
   1,057.54/1,459.38 = 591.88/x
3. Step 3: Cross multiply
   1,057.54x = 1,459.38 × 591.88
4. Step 4: Simplify right side
   1,057.54x = 863,777.83
5. Step 5: Solve for x
   x = 863,777.83/1,057.54
6. Step 6: Final answer
   x = 816.78