Finding the Fourth Proportional to 1,056.82, 1,458.41 and 591.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,056.82 : 1,458.41 = 591.07 : x
2. Step 2: Convert to fraction form
   1,056.82/1,458.41 = 591.07/x
3. Step 3: Cross multiply
   1,056.82x = 1,458.41 × 591.07
4. Step 4: Simplify right side
   1,056.82x = 862,012.15
5. Step 5: Solve for x
   x = 862,012.15/1,056.82
6. Step 6: Final answer
   x = 815.67