Finding the Fourth Proportional to 1,667.30, 2,300.70 and 921.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.30 : 2,300.70 = 921.22 : x
2. Step 2: Convert to fraction form
   1,667.30/2,300.70 = 921.22/x
3. Step 3: Cross multiply
   1,667.30x = 2,300.70 × 921.22
4. Step 4: Simplify right side
   1,667.30x = 2,119,450.85
5. Step 5: Solve for x
   x = 2,119,450.85/1,667.30
6. Step 6: Final answer
   x = 1,271.19