Finding the Fourth Proportional to 1,667.94, 2,301.69 and 921.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.94 : 2,301.69 = 921.93 : x
2. Step 2: Convert to fraction form
   1,667.94/2,301.69 = 921.93/x
3. Step 3: Cross multiply
   1,667.94x = 2,301.69 × 921.93
4. Step 4: Simplify right side
   1,667.94x = 2,121,997.06
5. Step 5: Solve for x
   x = 2,121,997.06/1,667.94
6. Step 6: Final answer
   x = 1,272.23