Finding the Fourth Proportional to 1,438.88, 1,985.79 and 941.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,438.88 : 1,985.79 = 941.78 : x
2. Step 2: Convert to fraction form
   1,438.88/1,985.79 = 941.78/x
3. Step 3: Cross multiply
   1,438.88x = 1,985.79 × 941.78
4. Step 4: Simplify right side
   1,438.88x = 1,870,182.27
5. Step 5: Solve for x
   x = 1,870,182.27/1,438.88
6. Step 6: Final answer
   x = 1,299.75