Finding the Fourth Proportional to 1,440.38, 1,987.72 and 943.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,440.38 : 1,987.72 = 943.84 : x
2. Step 2: Convert to fraction form
   1,440.38/1,987.72 = 943.84/x
3. Step 3: Cross multiply
   1,440.38x = 1,987.72 × 943.84
4. Step 4: Simplify right side
   1,440.38x = 1,876,089.64
5. Step 5: Solve for x
   x = 1,876,089.64/1,440.38
6. Step 6: Final answer
   x = 1,302.50