Finding the Fourth Proportional to 2,158.05, 3,236.86 and 925.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158.05 : 3,236.86 = 925.23 : x
2. Step 2: Convert to fraction form
   2,158.05/3,236.86 = 925.23/x
3. Step 3: Cross multiply
   2,158.05x = 3,236.86 × 925.23
4. Step 4: Simplify right side
   2,158.05x = 2,994,839.98
5. Step 5: Solve for x
   x = 2,994,839.98/2,158.05
6. Step 6: Final answer
   x = 1,387.75