Finding the Fourth Proportional to 3,915.53, 5,874.21 and 1,318.46

Step by Step Solution

1. Step 1: Write the proportion equation
   3,915.53 : 5,874.21 = 1,318.46 : x
2. Step 2: Convert to fraction form
   3,915.53/5,874.21 = 1,318.46/x
3. Step 3: Cross multiply
   3,915.53x = 5,874.21 × 1,318.46
4. Step 4: Simplify right side
   3,915.53x = 7,744,945.86
5. Step 5: Solve for x
   x = 7,744,945.86/3,915.53
6. Step 6: Final answer
   x = 1,978.01