Finding the Fourth Proportional to 1,960.72, 2,939.20 and 985.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,960.72 : 2,939.20 = 985.88 : x
2. Step 2: Convert to fraction form
   1,960.72/2,939.20 = 985.88/x
3. Step 3: Cross multiply
   1,960.72x = 2,939.20 × 985.88
4. Step 4: Simplify right side
   1,960.72x = 2,897,698.50
5. Step 5: Solve for x
   x = 2,897,698.50/1,960.72
6. Step 6: Final answer
   x = 1,477.87