Finding the Fourth Proportional to 1,401.10, 1,931.52 and 958.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.10 : 1,931.52 = 958.30 : x
2. Step 2: Convert to fraction form
   1,401.10/1,931.52 = 958.30/x
3. Step 3: Cross multiply
   1,401.10x = 1,931.52 × 958.30
4. Step 4: Simplify right side
   1,401.10x = 1,850,975.62
5. Step 5: Solve for x
   x = 1,850,975.62/1,401.10
6. Step 6: Final answer
   x = 1,321.09