Finding the Fourth Proportional to 1,112.94, 1,669.68 and 1,105.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,112.94 : 1,669.68 = 1,105.25 : x
2. Step 2: Convert to fraction form
   1,112.94/1,669.68 = 1,105.25/x
3. Step 3: Cross multiply
   1,112.94x = 1,669.68 × 1,105.25
4. Step 4: Simplify right side
   1,112.94x = 1,845,405.47
5. Step 5: Solve for x
   x = 1,845,405.47/1,112.94
6. Step 6: Final answer
   x = 1,658.14