Finding the Fourth Proportional to 3,947.72, 5,915.93 and 2,899.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,947.72 : 5,915.93 = 2,899.50 : x
2. Step 2: Convert to fraction form
   3,947.72/5,915.93 = 2,899.50/x
3. Step 3: Cross multiply
   3,947.72x = 5,915.93 × 2,899.50
4. Step 4: Simplify right side
   3,947.72x = 17,153,239.04
5. Step 5: Solve for x
   x = 17,153,239.04/3,947.72
6. Step 6: Final answer
   x = 4,345.10