Finding the Fourth Proportional to 1,056.67, 1,458.17 and 590.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,056.67 : 1,458.17 = 590.89 : x
2. Step 2: Convert to fraction form
   1,056.67/1,458.17 = 590.89/x
3. Step 3: Cross multiply
   1,056.67x = 1,458.17 × 590.89
4. Step 4: Simplify right side
   1,056.67x = 861,615.12
5. Step 5: Solve for x
   x = 861,615.12/1,056.67
6. Step 6: Final answer
   x = 815.41