Finding the Fourth Proportional to 1,667.67, 2,301.37 and 921.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.67 : 2,301.37 = 921.63 : x
2. Step 2: Convert to fraction form
   1,667.67/2,301.37 = 921.63/x
3. Step 3: Cross multiply
   1,667.67x = 2,301.37 × 921.63
4. Step 4: Simplify right side
   1,667.67x = 2,121,011.63
5. Step 5: Solve for x
   x = 2,121,011.63/1,667.67
6. Step 6: Final answer
   x = 1,271.84