Finding the Fourth Proportional to 2,155.98, 2,974.56 and 1,272.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,155.98 : 2,974.56 = 1,272.08 : x
2. Step 2: Convert to fraction form
   2,155.98/2,974.56 = 1,272.08/x
3. Step 3: Cross multiply
   2,155.98x = 2,974.56 × 1,272.08
4. Step 4: Simplify right side
   2,155.98x = 3,783,878.28
5. Step 5: Solve for x
   x = 3,783,878.28/2,155.98
6. Step 6: Final answer
   x = 1,755.06