Finding the Fourth Proportional to 1,434.84, 1,980.41 and 936.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,434.84 : 1,980.41 = 936.60 : x
2. Step 2: Convert to fraction form
   1,434.84/1,980.41 = 936.60/x
3. Step 3: Cross multiply
   1,434.84x = 1,980.41 × 936.60
4. Step 4: Simplify right side
   1,434.84x = 1,854,852.01
5. Step 5: Solve for x
   x = 1,854,852.01/1,434.84
6. Step 6: Final answer
   x = 1,292.72