Finding the Fourth Proportional to 1,406.34, 1,939.23 and 958.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,406.34 : 1,939.23 = 958.50 : x
2. Step 2: Convert to fraction form
   1,406.34/1,939.23 = 958.50/x
3. Step 3: Cross multiply
   1,406.34x = 1,939.23 × 958.50
4. Step 4: Simplify right side
   1,406.34x = 1,858,751.96
5. Step 5: Solve for x
   x = 1,858,751.96/1,406.34
6. Step 6: Final answer
   x = 1,321.69