Finding the Fourth Proportional to 1,939.28, 2,675.55 and 1,276.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,939.28 : 2,675.55 = 1,276.81 : x
2. Step 2: Convert to fraction form
   1,939.28/2,675.55 = 1,276.81/x
3. Step 3: Cross multiply
   1,939.28x = 2,675.55 × 1,276.81
4. Step 4: Simplify right side
   1,939.28x = 3,416,162.31
5. Step 5: Solve for x
   x = 3,416,162.31/1,939.28
6. Step 6: Final answer
   x = 1,761.56