Finding the Fourth Proportional to 3,947.47, 5,915.56 and 2,899.25

Step by Step Solution

1. Step 1: Write the proportion equation
   3,947.47 : 5,915.56 = 2,899.25 : x
2. Step 2: Convert to fraction form
   3,947.47/5,915.56 = 2,899.25/x
3. Step 3: Cross multiply
   3,947.47x = 5,915.56 × 2,899.25
4. Step 4: Simplify right side
   3,947.47x = 17,150,643.26
5. Step 5: Solve for x
   x = 17,150,643.26/3,947.47
6. Step 6: Final answer
   x = 4,344.72