Finding the Fourth Proportional to 1,441.06, 1,988.45 and 843.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,441.06 : 1,988.45 = 843.60 : x
2. Step 2: Convert to fraction form
   1,441.06/1,988.45 = 843.60/x
3. Step 3: Cross multiply
   1,441.06x = 1,988.45 × 843.60
4. Step 4: Simplify right side
   1,441.06x = 1,677,462.82
5. Step 5: Solve for x
   x = 1,677,462.82/1,441.06
6. Step 6: Final answer
   x = 1,164.05