Finding the Fourth Proportional to 1,559.09, 2,151.29 and 970.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,559.09 : 2,151.29 = 970.43 : x
2. Step 2: Convert to fraction form
   1,559.09/2,151.29 = 970.43/x
3. Step 3: Cross multiply
   1,559.09x = 2,151.29 × 970.43
4. Step 4: Simplify right side
   1,559.09x = 2,087,668.02
5. Step 5: Solve for x
   x = 2,087,668.02/1,559.09
6. Step 6: Final answer
   x = 1,339.03