Finding the Fourth Proportional to 8,715.89, 12,028.95 and 5,179.10

Step by Step Solution

1. Step 1: Write the proportion equation
   8,715.89 : 12,028.95 = 5,179.10 : x
2. Step 2: Convert to fraction form
   8,715.89/12,028.95 = 5,179.10/x
3. Step 3: Cross multiply
   8,715.89x = 12,028.95 × 5,179.10
4. Step 4: Simplify right side
   8,715.89x = 62,299,165.02
5. Step 5: Solve for x
   x = 62,299,165.02/8,715.89
6. Step 6: Final answer
   x = 7,147.77