Finding the Fourth Proportional to 3,915.76, 5,873.88 and 994.09

Step by Step Solution

1. Step 1: Write the proportion equation
   3,915.76 : 5,873.88 = 994.09 : x
2. Step 2: Convert to fraction form
   3,915.76/5,873.88 = 994.09/x
3. Step 3: Cross multiply
   3,915.76x = 5,873.88 × 994.09
4. Step 4: Simplify right side
   3,915.76x = 5,839,165.37
5. Step 5: Solve for x
   x = 5,839,165.37/3,915.76
6. Step 6: Final answer
   x = 1,491.20