Finding the Fourth Proportional to 1,225.01, 1,690.52 and 693.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,225.01 : 1,690.52 = 693.92 : x
2. Step 2: Convert to fraction form
   1,225.01/1,690.52 = 693.92/x
3. Step 3: Cross multiply
   1,225.01x = 1,690.52 × 693.92
4. Step 4: Simplify right side
   1,225.01x = 1,173,073.72
5. Step 5: Solve for x
   x = 1,173,073.72/1,225.01
6. Step 6: Final answer
   x = 957.61