Finding the Fourth Proportional to 1,061.22, 1,461.22 and 921.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.22 : 1,461.22 = 921.09 : x
2. Step 2: Convert to fraction form
   1,061.22/1,461.22 = 921.09/x
3. Step 3: Cross multiply
   1,061.22x = 1,461.22 × 921.09
4. Step 4: Simplify right side
   1,061.22x = 1,345,915.13
5. Step 5: Solve for x
   x = 1,345,915.13/1,061.22
6. Step 6: Final answer
   x = 1,268.27