Finding the Fourth Proportional to 1,726.56, 2,578.14 and 1,357.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,726.56 : 2,578.14 = 1,357.20 : x
2. Step 2: Convert to fraction form
   1,726.56/2,578.14 = 1,357.20/x
3. Step 3: Cross multiply
   1,726.56x = 2,578.14 × 1,357.20
4. Step 4: Simplify right side
   1,726.56x = 3,499,051.61
5. Step 5: Solve for x
   x = 3,499,051.61/1,726.56
6. Step 6: Final answer
   x = 2,026.60