Finding the Fourth Proportional to 1,667.75, 2,301.47 and 921.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.75 : 2,301.47 = 921.71 : x
2. Step 2: Convert to fraction form
   1,667.75/2,301.47 = 921.71/x
3. Step 3: Cross multiply
   1,667.75x = 2,301.47 × 921.71
4. Step 4: Simplify right side
   1,667.75x = 2,121,283.31
5. Step 5: Solve for x
   x = 2,121,283.31/1,667.75
6. Step 6: Final answer
   x = 1,271.94