Finding the Fourth Proportional to 1,667.48, 2,301.05 and 921.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.48 : 2,301.05 = 921.42 : x
2. Step 2: Convert to fraction form
   1,667.48/2,301.05 = 921.42/x
3. Step 3: Cross multiply
   1,667.48x = 2,301.05 × 921.42
4. Step 4: Simplify right side
   1,667.48x = 2,120,228.88
5. Step 5: Solve for x
   x = 2,120,228.88/1,667.48
6. Step 6: Final answer
   x = 1,271.52