Finding the Fourth Proportional to 2,155.80, 2,974.56 and 1,270.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,155.80 : 2,974.56 = 1,270.98 : x
2. Step 2: Convert to fraction form
   2,155.80/2,974.56 = 1,270.98/x
3. Step 3: Cross multiply
   2,155.80x = 2,974.56 × 1,270.98
4. Step 4: Simplify right side
   2,155.80x = 3,780,606.27
5. Step 5: Solve for x
   x = 3,780,606.27/2,155.80
6. Step 6: Final answer
   x = 1,753.69