Finding the Fourth Proportional to 1,667.42, 2,301.02 and 921.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.42 : 2,301.02 = 921.43 : x
2. Step 2: Convert to fraction form
   1,667.42/2,301.02 = 921.43/x
3. Step 3: Cross multiply
   1,667.42x = 2,301.02 × 921.43
4. Step 4: Simplify right side
   1,667.42x = 2,120,222.82
5. Step 5: Solve for x
   x = 2,120,222.82/1,667.42
6. Step 6: Final answer
   x = 1,271.56