Finding the Fourth Proportional to 8,193.51, 12,207.83 and 8,111.57

Step by Step Solution

1. Step 1: Write the proportion equation
   8,193.51 : 12,207.83 = 8,111.57 : x
2. Step 2: Convert to fraction form
   8,193.51/12,207.83 = 8,111.57/x
3. Step 3: Cross multiply
   8,193.51x = 12,207.83 × 8,111.57
4. Step 4: Simplify right side
   8,193.51x = 99,024,566.00
5. Step 5: Solve for x
   x = 99,024,566.00/8,193.51
6. Step 6: Final answer
   x = 12,085.73