Finding the Fourth Proportional to 1,667.46, 2,300.97 and 921.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.46 : 2,300.97 = 921.30 : x
2. Step 2: Convert to fraction form
   1,667.46/2,300.97 = 921.30/x
3. Step 3: Cross multiply
   1,667.46x = 2,300.97 × 921.30
4. Step 4: Simplify right side
   1,667.46x = 2,119,883.66
5. Step 5: Solve for x
   x = 2,119,883.66/1,667.46
6. Step 6: Final answer
   x = 1,271.33