Finding the Fourth Proportional to 13,080.51, 18,051.18 and 7,112.16

Step by Step Solution

1. Step 1: Write the proportion equation
   13,080.51 : 18,051.18 = 7,112.16 : x
2. Step 2: Convert to fraction form
   13,080.51/18,051.18 = 7,112.16/x
3. Step 3: Cross multiply
   13,080.51x = 18,051.18 × 7,112.16
4. Step 4: Simplify right side
   13,080.51x = 128,382,880.35
5. Step 5: Solve for x
   x = 128,382,880.35/13,080.51
6. Step 6: Final answer
   x = 9,814.82