Finding the Fourth Proportional to 8,111.61, 12,108.74 and 7,127.46

Step by Step Solution

1. Step 1: Write the proportion equation
   8,111.61 : 12,108.74 = 7,127.46 : x
2. Step 2: Convert to fraction form
   8,111.61/12,108.74 = 7,127.46/x
3. Step 3: Cross multiply
   8,111.61x = 12,108.74 × 7,127.46
4. Step 4: Simplify right side
   8,111.61x = 86,304,524.36
5. Step 5: Solve for x
   x = 86,304,524.36/8,111.61
6. Step 6: Final answer
   x = 10,639.63