Finding the Fourth Proportional to 1,281.91, 1,769.78 and 1,208.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,281.91 : 1,769.78 = 1,208.10 : x
2. Step 2: Convert to fraction form
   1,281.91/1,769.78 = 1,208.10/x
3. Step 3: Cross multiply
   1,281.91x = 1,769.78 × 1,208.10
4. Step 4: Simplify right side
   1,281.91x = 2,138,071.22
5. Step 5: Solve for x
   x = 2,138,071.22/1,281.91
6. Step 6: Final answer
   x = 1,667.88