Finding the Fourth Proportional to 1,621.30, 2,237.41 and 922.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,621.30 : 2,237.41 = 922.72 : x
2. Step 2: Convert to fraction form
   1,621.30/2,237.41 = 922.72/x
3. Step 3: Cross multiply
   1,621.30x = 2,237.41 × 922.72
4. Step 4: Simplify right side
   1,621.30x = 2,064,495.05
5. Step 5: Solve for x
   x = 2,064,495.05/1,621.30
6. Step 6: Final answer
   x = 1,273.36