Finding the Fourth Proportional to 1,440.88, 1,988.55 and 943.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,440.88 : 1,988.55 = 943.78 : x
2. Step 2: Convert to fraction form
   1,440.88/1,988.55 = 943.78/x
3. Step 3: Cross multiply
   1,440.88x = 1,988.55 × 943.78
4. Step 4: Simplify right side
   1,440.88x = 1,876,753.72
5. Step 5: Solve for x
   x = 1,876,753.72/1,440.88
6. Step 6: Final answer
   x = 1,302.51