Finding the Fourth Proportional to 1,621.62, 2,238.17 and 958.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,621.62 : 2,238.17 = 958.50 : x
2. Step 2: Convert to fraction form
   1,621.62/2,238.17 = 958.50/x
3. Step 3: Cross multiply
   1,621.62x = 2,238.17 × 958.50
4. Step 4: Simplify right side
   1,621.62x = 2,145,281.15
5. Step 5: Solve for x
   x = 2,145,281.15/1,621.62
6. Step 6: Final answer
   x = 1,322.92