Finding the Fourth Proportional to 3,100.68, 4,275.72 and 2,157.54

Step by Step Solution

1. Step 1: Write the proportion equation
   3,100.68 : 4,275.72 = 2,157.54 : x
2. Step 2: Convert to fraction form
   3,100.68/4,275.72 = 2,157.54/x
3. Step 3: Cross multiply
   3,100.68x = 4,275.72 × 2,157.54
4. Step 4: Simplify right side
   3,100.68x = 9,225,036.93
5. Step 5: Solve for x
   x = 9,225,036.93/3,100.68
6. Step 6: Final answer
   x = 2,975.17