Finding the Fourth Proportional to 2,111.90, 3,168.43 and 925.73

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.90 : 3,168.43 = 925.73 : x
2. Step 2: Convert to fraction form
   2,111.90/3,168.43 = 925.73/x
3. Step 3: Cross multiply
   2,111.90x = 3,168.43 × 925.73
4. Step 4: Simplify right side
   2,111.90x = 2,933,090.23
5. Step 5: Solve for x
   x = 2,933,090.23/2,111.90
6. Step 6: Final answer
   x = 1,388.84