Finding the Fourth Proportional to 1,036.82, 1,431.50 and 970.70

Step by Step Solution

1. Step 1: Write the proportion equation
   1,036.82 : 1,431.50 = 970.70 : x
2. Step 2: Convert to fraction form
   1,036.82/1,431.50 = 970.70/x
3. Step 3: Cross multiply
   1,036.82x = 1,431.50 × 970.70
4. Step 4: Simplify right side
   1,036.82x = 1,389,545.04
5. Step 5: Solve for x
   x = 1,389,545.04/1,036.82
6. Step 6: Final answer
   x = 1,340.21