Finding the Fourth Proportional to 1,225.01, 1,690.10 and 693.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,225.01 : 1,690.10 = 693.83 : x
2. Step 2: Convert to fraction form
   1,225.01/1,690.10 = 693.83/x
3. Step 3: Cross multiply
   1,225.01x = 1,690.10 × 693.83
4. Step 4: Simplify right side
   1,225.01x = 1,172,630.16
5. Step 5: Solve for x
   x = 1,172,630.16/1,225.01
6. Step 6: Final answer
   x = 957.25