Finding the Fourth Proportional to 1,045.92, 1,443.60 and 696.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,045.92 : 1,443.60 = 696.72 : x
2. Step 2: Convert to fraction form
   1,045.92/1,443.60 = 696.72/x
3. Step 3: Cross multiply
   1,045.92x = 1,443.60 × 696.72
4. Step 4: Simplify right side
   1,045.92x = 1,005,784.99
5. Step 5: Solve for x
   x = 1,005,784.99/1,045.92
6. Step 6: Final answer
   x = 961.63