Finding the Fourth Proportional to 2,157.72, 2,974.23 and 1,761

Step by Step Solution

1. Step 1: Write the proportion equation
   2,157.72 : 2,974.23 = 1,761 : x
2. Step 2: Convert to fraction form
   2,157.72/2,974.23 = 1,761/x
3. Step 3: Cross multiply
   2,157.72x = 2,974.23 × 1,761
4. Step 4: Simplify right side
   2,157.72x = 5,237,619.03
5. Step 5: Solve for x
   x = 5,237,619.03/2,157.72
6. Step 6: Final answer
   x = 2,427.39