Finding the Fourth Proportional to 1,955.60, 2,698.78 and 1,189.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,955.60 : 2,698.78 = 1,189.06 : x
2. Step 2: Convert to fraction form
   1,955.60/2,698.78 = 1,189.06/x
3. Step 3: Cross multiply
   1,955.60x = 2,698.78 × 1,189.06
4. Step 4: Simplify right side
   1,955.60x = 3,209,019.18
5. Step 5: Solve for x
   x = 3,209,019.18/1,955.60
6. Step 6: Final answer
   x = 1,640.94