Finding the Fourth Proportional to 1,960.67, 2,939.59 and 987.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,960.67 : 2,939.59 = 987.46 : x
2. Step 2: Convert to fraction form
   1,960.67/2,939.59 = 987.46/x
3. Step 3: Cross multiply
   1,960.67x = 2,939.59 × 987.46
4. Step 4: Simplify right side
   1,960.67x = 2,902,721.43
5. Step 5: Solve for x
   x = 2,902,721.43/1,960.67
6. Step 6: Final answer
   x = 1,480.47