Finding the Fourth Proportional to 1,621.63, 2,238.25 and 923.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,621.63 : 2,238.25 = 923.41 : x
2. Step 2: Convert to fraction form
   1,621.63/2,238.25 = 923.41/x
3. Step 3: Cross multiply
   1,621.63x = 2,238.25 × 923.41
4. Step 4: Simplify right side
   1,621.63x = 2,066,822.43
5. Step 5: Solve for x
   x = 2,066,822.43/1,621.63
6. Step 6: Final answer
   x = 1,274.53