Finding the Fourth Proportional to 2,153.91, 3,231.50 and 693.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,153.91 : 3,231.50 = 693.02 : x
2. Step 2: Convert to fraction form
   2,153.91/3,231.50 = 693.02/x
3. Step 3: Cross multiply
   2,153.91x = 3,231.50 × 693.02
4. Step 4: Simplify right side
   2,153.91x = 2,239,498.74
5. Step 5: Solve for x
   x = 2,239,498.74/2,153.91
6. Step 6: Final answer
   x = 1,039.74