Finding the Fourth Proportional to 1,362.22, 1,880.76 and 921.14

Step by Step Solution

1. Step 1: Write the proportion equation
   1,362.22 : 1,880.76 = 921.14 : x
2. Step 2: Convert to fraction form
   1,362.22/1,880.76 = 921.14/x
3. Step 3: Cross multiply
   1,362.22x = 1,880.76 × 921.14
4. Step 4: Simplify right side
   1,362.22x = 1,732,443.27
5. Step 5: Solve for x
   x = 1,732,443.27/1,362.22
6. Step 6: Final answer
   x = 1,271.78