Finding the Fourth Proportional to 2,112.75, 2,915.60 and 1,181.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,112.75 : 2,915.60 = 1,181.25 : x
2. Step 2: Convert to fraction form
   2,112.75/2,915.60 = 1,181.25/x
3. Step 3: Cross multiply
   2,112.75x = 2,915.60 × 1,181.25
4. Step 4: Simplify right side
   2,112.75x = 3,444,046.59
5. Step 5: Solve for x
   x = 3,444,046.59/2,112.75
6. Step 6: Final answer
   x = 1,630.13