Finding the Fourth Proportional to 3,915.87, 5,404.01 and 2,147.59

Step by Step Solution

1. Step 1: Write the proportion equation
   3,915.87 : 5,404.01 = 2,147.59 : x
2. Step 2: Convert to fraction form
   3,915.87/5,404.01 = 2,147.59/x
3. Step 3: Cross multiply
   3,915.87x = 5,404.01 × 2,147.59
4. Step 4: Simplify right side
   3,915.87x = 11,605,597.84
5. Step 5: Solve for x
   x = 11,605,597.84/3,915.87
6. Step 6: Final answer
   x = 2,963.73