Finding the Fourth Proportional to 3,907.31, 5,859.88 and 1,715.49

Step by Step Solution

1. Step 1: Write the proportion equation
   3,907.31 : 5,859.88 = 1,715.49 : x
2. Step 2: Convert to fraction form
   3,907.31/5,859.88 = 1,715.49/x
3. Step 3: Cross multiply
   3,907.31x = 5,859.88 × 1,715.49
4. Step 4: Simplify right side
   3,907.31x = 10,052,561.25
5. Step 5: Solve for x
   x = 10,052,561.25/3,907.31
6. Step 6: Final answer
   x = 2,572.76