Finding the Fourth Proportional to 1,647.30, 2,471.37 and 1,161.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,647.30 : 2,471.37 = 1,161.30 : x
2. Step 2: Convert to fraction form
   1,647.30/2,471.37 = 1,161.30/x
3. Step 3: Cross multiply
   1,647.30x = 2,471.37 × 1,161.30
4. Step 4: Simplify right side
   1,647.30x = 2,870,001.98
5. Step 5: Solve for x
   x = 2,870,001.98/1,647.30
6. Step 6: Final answer
   x = 1,742.25