Finding the Fourth Proportional to 1,225.32, 1,690.56 and 694.14

Step by Step Solution

1. Step 1: Write the proportion equation
   1,225.32 : 1,690.56 = 694.14 : x
2. Step 2: Convert to fraction form
   1,225.32/1,690.56 = 694.14/x
3. Step 3: Cross multiply
   1,225.32x = 1,690.56 × 694.14
4. Step 4: Simplify right side
   1,225.32x = 1,173,485.32
5. Step 5: Solve for x
   x = 1,173,485.32/1,225.32
6. Step 6: Final answer
   x = 957.70