Finding the Fourth Proportional to 1,528.54, 2,109.71 and 969.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,528.54 : 2,109.71 = 969.77 : x
2. Step 2: Convert to fraction form
   1,528.54/2,109.71 = 969.77/x
3. Step 3: Cross multiply
   1,528.54x = 2,109.71 × 969.77
4. Step 4: Simplify right side
   1,528.54x = 2,045,941.17
5. Step 5: Solve for x
   x = 2,045,941.17/1,528.54
6. Step 6: Final answer
   x = 1,338.50