Finding the Fourth Proportional to 2,223.91, 3,335.59 and 925.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,223.91 : 3,335.59 = 925.21 : x
2. Step 2: Convert to fraction form
   2,223.91/3,335.59 = 925.21/x
3. Step 3: Cross multiply
   2,223.91x = 3,335.59 × 925.21
4. Step 4: Simplify right side
   2,223.91x = 3,086,121.22
5. Step 5: Solve for x
   x = 3,086,121.22/2,223.91
6. Step 6: Final answer
   x = 1,387.70