Finding the Fourth Proportional to 13,080.18, 18,050.46 and 7,111.68

Step by Step Solution

1. Step 1: Write the proportion equation
   13,080.18 : 18,050.46 = 7,111.68 : x
2. Step 2: Convert to fraction form
   13,080.18/18,050.46 = 7,111.68/x
3. Step 3: Cross multiply
   13,080.18x = 18,050.46 × 7,111.68
4. Step 4: Simplify right side
   13,080.18x = 128,369,095.37
5. Step 5: Solve for x
   x = 128,369,095.37/13,080.18
6. Step 6: Final answer
   x = 9,814.02