Finding the Fourth Proportional to 1,168.67, 1,614.71 and 921.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,168.67 : 1,614.71 = 921.87 : x
2. Step 2: Convert to fraction form
   1,168.67/1,614.71 = 921.87/x
3. Step 3: Cross multiply
   1,168.67x = 1,614.71 × 921.87
4. Step 4: Simplify right side
   1,168.67x = 1,488,548.10
5. Step 5: Solve for x
   x = 1,488,548.10/1,168.67
6. Step 6: Final answer
   x = 1,273.71