Finding the Fourth Proportional to 1,914.25, 2,641.57 and 1,128.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,914.25 : 2,641.57 = 1,128.25 : x
2. Step 2: Convert to fraction form
   1,914.25/2,641.57 = 1,128.25/x
3. Step 3: Cross multiply
   1,914.25x = 2,641.57 × 1,128.25
4. Step 4: Simplify right side
   1,914.25x = 2,980,351.35
5. Step 5: Solve for x
   x = 2,980,351.35/1,914.25
6. Step 6: Final answer
   x = 1,556.93