Finding the Fourth Proportional to 2,157.69, 3,235.86 and 925.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,157.69 : 3,235.86 = 925.05 : x
2. Step 2: Convert to fraction form
   2,157.69/3,235.86 = 925.05/x
3. Step 3: Cross multiply
   2,157.69x = 3,235.86 × 925.05
4. Step 4: Simplify right side
   2,157.69x = 2,993,332.29
5. Step 5: Solve for x
   x = 2,993,332.29/2,157.69
6. Step 6: Final answer
   x = 1,387.29