Finding the Fourth Proportional to 1,621.82, 2,238.12 and 923.19

Step by Step Solution

1. Step 1: Write the proportion equation
   1,621.82 : 2,238.12 = 923.19 : x
2. Step 2: Convert to fraction form
   1,621.82/2,238.12 = 923.19/x
3. Step 3: Cross multiply
   1,621.82x = 2,238.12 × 923.19
4. Step 4: Simplify right side
   1,621.82x = 2,066,205.39
5. Step 5: Solve for x
   x = 2,066,205.39/1,621.82
6. Step 6: Final answer
   x = 1,274.01