Finding the Fourth Proportional to 1,321.87, 1,982.72 and 591.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,321.87 : 1,982.72 = 591.25 : x
2. Step 2: Convert to fraction form
   1,321.87/1,982.72 = 591.25/x
3. Step 3: Cross multiply
   1,321.87x = 1,982.72 × 591.25
4. Step 4: Simplify right side
   1,321.87x = 1,172,279.72
5. Step 5: Solve for x
   x = 1,172,279.72/1,321.87
6. Step 6: Final answer
   x = 886.84