Finding the Fourth Proportional to 1,285.86, 1,774.50 and 696.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,285.86 : 1,774.50 = 696.41 : x
2. Step 2: Convert to fraction form
   1,285.86/1,774.50 = 696.41/x
3. Step 3: Cross multiply
   1,285.86x = 1,774.50 × 696.41
4. Step 4: Simplify right side
   1,285.86x = 1,235,779.55
5. Step 5: Solve for x
   x = 1,235,779.55/1,285.86
6. Step 6: Final answer
   x = 961.05