Finding the Fourth Proportional to 1,745.31, 2,620.19 and 1,131.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,745.31 : 2,620.19 = 1,131.59 : x
2. Step 2: Convert to fraction form
   1,745.31/2,620.19 = 1,131.59/x
3. Step 3: Cross multiply
   1,745.31x = 2,620.19 × 1,131.59
4. Step 4: Simplify right side
   1,745.31x = 2,964,967.70
5. Step 5: Solve for x
   x = 2,964,967.70/1,745.31
6. Step 6: Final answer
   x = 1,698.82