Finding the Fourth Proportional to 8,111.07, 11,185.83 and 5,121.63

Step by Step Solution

1. Step 1: Write the proportion equation
   8,111.07 : 11,185.83 = 5,121.63 : x
2. Step 2: Convert to fraction form
   8,111.07/11,185.83 = 5,121.63/x
3. Step 3: Cross multiply
   8,111.07x = 11,185.83 × 5,121.63
4. Step 4: Simplify right side
   8,111.07x = 57,289,682.50
5. Step 5: Solve for x
   x = 57,289,682.50/8,111.07
6. Step 6: Final answer
   x = 7,063.15