Finding the Fourth Proportional to 7,915.21, 10,924.50 and 5,086.15

Step by Step Solution

1. Step 1: Write the proportion equation
   7,915.21 : 10,924.50 = 5,086.15 : x
2. Step 2: Convert to fraction form
   7,915.21/10,924.50 = 5,086.15/x
3. Step 3: Cross multiply
   7,915.21x = 10,924.50 × 5,086.15
4. Step 4: Simplify right side
   7,915.21x = 55,563,645.68
5. Step 5: Solve for x
   x = 55,563,645.68/7,915.21
6. Step 6: Final answer
   x = 7,019.86