Finding the Fourth Proportional to 1,657.72, 2,287.90 and 1,127.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,657.72 : 2,287.90 = 1,127.37 : x
2. Step 2: Convert to fraction form
   1,657.72/2,287.90 = 1,127.37/x
3. Step 3: Cross multiply
   1,657.72x = 2,287.90 × 1,127.37
4. Step 4: Simplify right side
   1,657.72x = 2,579,309.82
5. Step 5: Solve for x
   x = 2,579,309.82/1,657.72
6. Step 6: Final answer
   x = 1,555.94