Finding the Fourth Proportional to 1,667.69, 2,301.26 and 921.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.69 : 2,301.26 = 921.52 : x
2. Step 2: Convert to fraction form
   1,667.69/2,301.26 = 921.52/x
3. Step 3: Cross multiply
   1,667.69x = 2,301.26 × 921.52
4. Step 4: Simplify right side
   1,667.69x = 2,120,657.12
5. Step 5: Solve for x
   x = 2,120,657.12/1,667.69
6. Step 6: Final answer
   x = 1,271.61