Finding the Fourth Proportional to 1,528.39, 2,109.96 and 969.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,528.39 : 2,109.96 = 969.43 : x
2. Step 2: Convert to fraction form
   1,528.39/2,109.96 = 969.43/x
3. Step 3: Cross multiply
   1,528.39x = 2,109.96 × 969.43
4. Step 4: Simplify right side
   1,528.39x = 2,045,458.52
5. Step 5: Solve for x
   x = 2,045,458.52/1,528.39
6. Step 6: Final answer
   x = 1,338.31