Finding the Fourth Proportional to 1,314.10, 1,813.83 and 921.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,314.10 : 1,813.83 = 921.22 : x
2. Step 2: Convert to fraction form
   1,314.10/1,813.83 = 921.22/x
3. Step 3: Cross multiply
   1,314.10x = 1,813.83 × 921.22
4. Step 4: Simplify right side
   1,314.10x = 1,670,936.47
5. Step 5: Solve for x
   x = 1,670,936.47/1,314.10
6. Step 6: Final answer
   x = 1,271.54