Finding the Fourth Proportional to 3,947.61, 5,915.76 and 2,899.38

Step by Step Solution

1. Step 1: Write the proportion equation
   3,947.61 : 5,915.76 = 2,899.38 : x
2. Step 2: Convert to fraction form
   3,947.61/5,915.76 = 2,899.38/x
3. Step 3: Cross multiply
   3,947.61x = 5,915.76 × 2,899.38
4. Step 4: Simplify right side
   3,947.61x = 17,152,036.23
5. Step 5: Solve for x
   x = 17,152,036.23/3,947.61
6. Step 6: Final answer
   x = 4,344.92