Finding the Fourth Proportional to 2,112.97, 2,915.91 and 1,181.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,112.97 : 2,915.91 = 1,181.47 : x
2. Step 2: Convert to fraction form
   2,112.97/2,915.91 = 1,181.47/x
3. Step 3: Cross multiply
   2,112.97x = 2,915.91 × 1,181.47
4. Step 4: Simplify right side
   2,112.97x = 3,445,045.61
5. Step 5: Solve for x
   x = 3,445,045.61/2,112.97
6. Step 6: Final answer
   x = 1,630.43