Finding the Fourth Proportional to 7,919.10, 10,926.90 and 5,086.98

Step by Step Solution

1. Step 1: Write the proportion equation
   7,919.10 : 10,926.90 = 5,086.98 : x
2. Step 2: Convert to fraction form
   7,919.10/10,926.90 = 5,086.98/x
3. Step 3: Cross multiply
   7,919.10x = 10,926.90 × 5,086.98
4. Step 4: Simplify right side
   7,919.10x = 55,584,921.76
5. Step 5: Solve for x
   x = 55,584,921.76/7,919.10
6. Step 6: Final answer
   x = 7,019.10