Finding the Fourth Proportional to 11,820.36, 17,730.53 and 8,111.34

Step by Step Solution

1. Step 1: Write the proportion equation
   11,820.36 : 17,730.53 = 8,111.34 : x
2. Step 2: Convert to fraction form
   11,820.36/17,730.53 = 8,111.34/x
3. Step 3: Cross multiply
   11,820.36x = 17,730.53 × 8,111.34
4. Step 4: Simplify right side
   11,820.36x = 143,818,347.07
5. Step 5: Solve for x
   x = 143,818,347.07/11,820.36
6. Step 6: Final answer
   x = 12,167.00