Finding the Fourth Proportional to 8,911.89, 12,301.15 and 5,137.58

Step by Step Solution

1. Step 1: Write the proportion equation
   8,911.89 : 12,301.15 = 5,137.58 : x
2. Step 2: Convert to fraction form
   8,911.89/12,301.15 = 5,137.58/x
3. Step 3: Cross multiply
   8,911.89x = 12,301.15 × 5,137.58
4. Step 4: Simplify right side
   8,911.89x = 63,198,142.22
5. Step 5: Solve for x
   x = 63,198,142.22/8,911.89
6. Step 6: Final answer
   x = 7,091.44