Finding the Fourth Proportional to 1,667.50, 2,301.15 and 921.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.50 : 2,301.15 = 921.46 : x
2. Step 2: Convert to fraction form
   1,667.50/2,301.15 = 921.46/x
3. Step 3: Cross multiply
   1,667.50x = 2,301.15 × 921.46
4. Step 4: Simplify right side
   1,667.50x = 2,120,417.68
5. Step 5: Solve for x
   x = 2,120,417.68/1,667.50
6. Step 6: Final answer
   x = 1,271.61