Finding the Fourth Proportional to 1,441.59, 1,988.88 and 851.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,441.59 : 1,988.88 = 851.71 : x
2. Step 2: Convert to fraction form
   1,441.59/1,988.88 = 851.71/x
3. Step 3: Cross multiply
   1,441.59x = 1,988.88 × 851.71
4. Step 4: Simplify right side
   1,441.59x = 1,693,948.98
5. Step 5: Solve for x
   x = 1,693,948.98/1,441.59
6. Step 6: Final answer
   x = 1,175.06