Finding the Fourth Proportional to 1,054.63, 1,581.72 and 745.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,054.63 : 1,581.72 = 745.61 : x
2. Step 2: Convert to fraction form
   1,054.63/1,581.72 = 745.61/x
3. Step 3: Cross multiply
   1,054.63x = 1,581.72 × 745.61
4. Step 4: Simplify right side
   1,054.63x = 1,179,346.25
5. Step 5: Solve for x
   x = 1,179,346.25/1,054.63
6. Step 6: Final answer
   x = 1,118.26