Finding the Fourth Proportional to 1,914.10, 2,641.41 and 1,128.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,914.10 : 2,641.41 = 1,128.20 : x
2. Step 2: Convert to fraction form
   1,914.10/2,641.41 = 1,128.20/x
3. Step 3: Cross multiply
   1,914.10x = 2,641.41 × 1,128.20
4. Step 4: Simplify right side
   1,914.10x = 2,980,038.76
5. Step 5: Solve for x
   x = 2,980,038.76/1,914.10
6. Step 6: Final answer
   x = 1,556.89