Finding the Fourth Proportional to 1,667.09, 2,300.59 and 921.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.09 : 2,300.59 = 921.04 : x
2. Step 2: Convert to fraction form
   1,667.09/2,300.59 = 921.04/x
3. Step 3: Cross multiply
   1,667.09x = 2,300.59 × 921.04
4. Step 4: Simplify right side
   1,667.09x = 2,118,938.57
5. Step 5: Solve for x
   x = 2,118,938.57/1,667.09
6. Step 6: Final answer
   x = 1,271.04