Finding the Fourth Proportional to 1,225.14, 1,690.56 and 693.95

Step by Step Solution

1. Step 1: Write the proportion equation
   1,225.14 : 1,690.56 = 693.95 : x
2. Step 2: Convert to fraction form
   1,225.14/1,690.56 = 693.95/x
3. Step 3: Cross multiply
   1,225.14x = 1,690.56 × 693.95
4. Step 4: Simplify right side
   1,225.14x = 1,173,171.32
5. Step 5: Solve for x
   x = 1,173,171.32/1,225.14
6. Step 6: Final answer
   x = 957.58