Finding the Fourth Proportional to 2,112.83, 2,915.85 and 1,181.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,112.83 : 2,915.85 = 1,181.33 : x
2. Step 2: Convert to fraction form
   2,112.83/2,915.85 = 1,181.33/x
3. Step 3: Cross multiply
   2,112.83x = 2,915.85 × 1,181.33
4. Step 4: Simplify right side
   2,112.83x = 3,444,581.08
5. Step 5: Solve for x
   x = 3,444,581.08/2,112.83
6. Step 6: Final answer
   x = 1,630.32