Finding the Fourth Proportional to 1,910.80, 2,861.33 and 1,259.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,910.80 : 2,861.33 = 1,259.56 : x
2. Step 2: Convert to fraction form
   1,910.80/2,861.33 = 1,259.56/x
3. Step 3: Cross multiply
   1,910.80x = 2,861.33 × 1,259.56
4. Step 4: Simplify right side
   1,910.80x = 3,604,016.81
5. Step 5: Solve for x
   x = 3,604,016.81/1,910.80
6. Step 6: Final answer
   x = 1,886.13