Finding the Fourth Proportional to 1,105.74, 1,525.64 and 958.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.74 : 1,525.64 = 958.10 : x
2. Step 2: Convert to fraction form
   1,105.74/1,525.64 = 958.10/x
3. Step 3: Cross multiply
   1,105.74x = 1,525.64 × 958.10
4. Step 4: Simplify right side
   1,105.74x = 1,461,703.27
5. Step 5: Solve for x
   x = 1,461,703.27/1,105.74
6. Step 6: Final answer
   x = 1,321.92