Finding the Fourth Proportional to 1,726.50, 2,381.61 and 1,128.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,726.50 : 2,381.61 = 1,128.16 : x
2. Step 2: Convert to fraction form
   1,726.50/2,381.61 = 1,128.16/x
3. Step 3: Cross multiply
   1,726.50x = 2,381.61 × 1,128.16
4. Step 4: Simplify right side
   1,726.50x = 2,686,837.14
5. Step 5: Solve for x
   x = 2,686,837.14/1,726.50
6. Step 6: Final answer
   x = 1,556.23