Finding the Fourth Proportional to 1,621.89, 2,238.07 and 958.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,621.89 : 2,238.07 = 958.62 : x
2. Step 2: Convert to fraction form
   1,621.89/2,238.07 = 958.62/x
3. Step 3: Cross multiply
   1,621.89x = 2,238.07 × 958.62
4. Step 4: Simplify right side
   1,621.89x = 2,145,458.66
5. Step 5: Solve for x
   x = 2,145,458.66/1,621.89
6. Step 6: Final answer
   x = 1,322.81