Finding the Fourth Proportional to 1,113.03, 1,667.07 and 1,085.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,113.03 : 1,667.07 = 1,085.49 : x
2. Step 2: Convert to fraction form
   1,113.03/1,667.07 = 1,085.49/x
3. Step 3: Cross multiply
   1,113.03x = 1,667.07 × 1,085.49
4. Step 4: Simplify right side
   1,113.03x = 1,809,587.81
5. Step 5: Solve for x
   x = 1,809,587.81/1,113.03
6. Step 6: Final answer
   x = 1,625.82