Finding the Fourth Proportional to 1,403.99, 2,105.37 and 745.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,403.99 : 2,105.37 = 745.72 : x
2. Step 2: Convert to fraction form
   1,403.99/2,105.37 = 745.72/x
3. Step 3: Cross multiply
   1,403.99x = 2,105.37 × 745.72
4. Step 4: Simplify right side
   1,403.99x = 1,570,009.39
5. Step 5: Solve for x
   x = 1,570,009.39/1,403.99
6. Step 6: Final answer
   x = 1,118.25