Finding the Fourth Proportional to 1,434.71, 1,979.60 and 938.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,434.71 : 1,979.60 = 938.07 : x
2. Step 2: Convert to fraction form
   1,434.71/1,979.60 = 938.07/x
3. Step 3: Cross multiply
   1,434.71x = 1,979.60 × 938.07
4. Step 4: Simplify right side
   1,434.71x = 1,856,998.68
5. Step 5: Solve for x
   x = 1,856,998.68/1,434.71
6. Step 6: Final answer
   x = 1,294.34