Finding the Fourth Proportional to 5,915.45, 8,146.70 and 5,786.28

Step by Step Solution

1. Step 1: Write the proportion equation
   5,915.45 : 8,146.70 = 5,786.28 : x
2. Step 2: Convert to fraction form
   5,915.45/8,146.70 = 5,786.28/x
3. Step 3: Cross multiply
   5,915.45x = 8,146.70 × 5,786.28
4. Step 4: Simplify right side
   5,915.45x = 47,139,061.01
5. Step 5: Solve for x
   x = 47,139,061.01/5,915.45
6. Step 6: Final answer
   x = 7,968.81