Finding the Fourth Proportional to 1,559.42, 2,151.90 and 969.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,559.42 : 2,151.90 = 969.94 : x
2. Step 2: Convert to fraction form
   1,559.42/2,151.90 = 969.94/x
3. Step 3: Cross multiply
   1,559.42x = 2,151.90 × 969.94
4. Step 4: Simplify right side
   1,559.42x = 2,087,213.89
5. Step 5: Solve for x
   x = 2,087,213.89/1,559.42
6. Step 6: Final answer
   x = 1,338.46