Finding the Fourth Proportional to 1,591.39, 2,196.09 and 970.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,591.39 : 2,196.09 = 970.39 : x
2. Step 2: Convert to fraction form
   1,591.39/2,196.09 = 970.39/x
3. Step 3: Cross multiply
   1,591.39x = 2,196.09 × 970.39
4. Step 4: Simplify right side
   1,591.39x = 2,131,063.78
5. Step 5: Solve for x
   x = 2,131,063.78/1,591.39
6. Step 6: Final answer
   x = 1,339.12