Finding the Fourth Proportional to 2,158.17, 3,236.72 and 925.44

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158.17 : 3,236.72 = 925.44 : x
2. Step 2: Convert to fraction form
   2,158.17/3,236.72 = 925.44/x
3. Step 3: Cross multiply
   2,158.17x = 3,236.72 × 925.44
4. Step 4: Simplify right side
   2,158.17x = 2,995,369.35
5. Step 5: Solve for x
   x = 2,995,369.35/2,158.17
6. Step 6: Final answer
   x = 1,387.92