Finding the Fourth Proportional to 1,441.23, 1,988.71 and 851.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,441.23 : 1,988.71 = 851.55 : x
2. Step 2: Convert to fraction form
   1,441.23/1,988.71 = 851.55/x
3. Step 3: Cross multiply
   1,441.23x = 1,988.71 × 851.55
4. Step 4: Simplify right side
   1,441.23x = 1,693,486.00
5. Step 5: Solve for x
   x = 1,693,486.00/1,441.23
6. Step 6: Final answer
   x = 1,175.03