Finding the Fourth Proportional to 13,080.11, 18,050.56 and 7,111.76

Step by Step Solution

1. Step 1: Write the proportion equation
   13,080.11 : 18,050.56 = 7,111.76 : x
2. Step 2: Convert to fraction form
   13,080.11/18,050.56 = 7,111.76/x
3. Step 3: Cross multiply
   13,080.11x = 18,050.56 × 7,111.76
4. Step 4: Simplify right side
   13,080.11x = 128,371,142.55
5. Step 5: Solve for x
   x = 128,371,142.55/13,080.11
6. Step 6: Final answer
   x = 9,814.23