Finding the Fourth Proportional to 1,558.85, 2,150.55 and 969.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,558.85 : 2,150.55 = 969.57 : x
2. Step 2: Convert to fraction form
   1,558.85/2,150.55 = 969.57/x
3. Step 3: Cross multiply
   1,558.85x = 2,150.55 × 969.57
4. Step 4: Simplify right side
   1,558.85x = 2,085,108.76
5. Step 5: Solve for x
   x = 2,085,108.76/1,558.85
6. Step 6: Final answer
   x = 1,337.60