Finding the Fourth Proportional to 1,621.55, 2,237.82 and 958.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,621.55 : 2,237.82 = 958.43 : x
2. Step 2: Convert to fraction form
   1,621.55/2,237.82 = 958.43/x
3. Step 3: Cross multiply
   1,621.55x = 2,237.82 × 958.43
4. Step 4: Simplify right side
   1,621.55x = 2,144,793.82
5. Step 5: Solve for x
   x = 2,144,793.82/1,621.55
6. Step 6: Final answer
   x = 1,322.68