Finding the Fourth Proportional to 1,066.42, 1,471.68 and 587.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,066.42 : 1,471.68 = 587.89 : x
2. Step 2: Convert to fraction form
   1,066.42/1,471.68 = 587.89/x
3. Step 3: Cross multiply
   1,066.42x = 1,471.68 × 587.89
4. Step 4: Simplify right side
   1,066.42x = 865,178.60
5. Step 5: Solve for x
   x = 865,178.60/1,066.42
6. Step 6: Final answer
   x = 811.30