Finding the Fourth Proportional to 2,155.16, 2,973.78 and 1,270.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,155.16 : 2,973.78 = 1,270.84 : x
2. Step 2: Convert to fraction form
   2,155.16/2,973.78 = 1,270.84/x
3. Step 3: Cross multiply
   2,155.16x = 2,973.78 × 1,270.84
4. Step 4: Simplify right side
   2,155.16x = 3,779,198.58
5. Step 5: Solve for x
   x = 3,779,198.58/2,155.16
6. Step 6: Final answer
   x = 1,753.56