Finding the Fourth Proportional to 2,859.94, 3,945.32 and 1,915.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,859.94 : 3,945.32 = 1,915.94 : x
2. Step 2: Convert to fraction form
   2,859.94/3,945.32 = 1,915.94/x
3. Step 3: Cross multiply
   2,859.94x = 3,945.32 × 1,915.94
4. Step 4: Simplify right side
   2,859.94x = 7,559,003.87
5. Step 5: Solve for x
   x = 7,559,003.87/2,859.94
6. Step 6: Final answer
   x = 2,643.06