Finding the Fourth Proportional to 1,054.29, 1,581.50 and 591.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,054.29 : 1,581.50 = 591.71 : x
2. Step 2: Convert to fraction form
   1,054.29/1,581.50 = 591.71/x
3. Step 3: Cross multiply
   1,054.29x = 1,581.50 × 591.71
4. Step 4: Simplify right side
   1,054.29x = 935,778.50
5. Step 5: Solve for x
   x = 935,778.50/1,054.29
6. Step 6: Final answer
   x = 887.59