Finding the Fourth Proportional to 2,156.54, 2,975.88 and 1,272.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,156.54 : 2,975.88 = 1,272.48 : x
2. Step 2: Convert to fraction form
   2,156.54/2,975.88 = 1,272.48/x
3. Step 3: Cross multiply
   2,156.54x = 2,975.88 × 1,272.48
4. Step 4: Simplify right side
   2,156.54x = 3,786,747.78
5. Step 5: Solve for x
   x = 3,786,747.78/2,156.54
6. Step 6: Final answer
   x = 1,755.94