Finding the Fourth Proportional to 1,434.80, 1,980.88 and 938.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,434.80 : 1,980.88 = 938.27 : x
2. Step 2: Convert to fraction form
   1,434.80/1,980.88 = 938.27/x
3. Step 3: Cross multiply
   1,434.80x = 1,980.88 × 938.27
4. Step 4: Simplify right side
   1,434.80x = 1,858,600.28
5. Step 5: Solve for x
   x = 1,858,600.28/1,434.80
6. Step 6: Final answer
   x = 1,295.37