Finding the Fourth Proportional to 1,667.80, 2,502.78 and 938.44

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.80 : 2,502.78 = 938.44 : x
2. Step 2: Convert to fraction form
   1,667.80/2,502.78 = 938.44/x
3. Step 3: Cross multiply
   1,667.80x = 2,502.78 × 938.44
4. Step 4: Simplify right side
   1,667.80x = 2,348,708.86
5. Step 5: Solve for x
   x = 2,348,708.86/1,667.80
6. Step 6: Final answer
   x = 1,408.27