Finding the Fourth Proportional to 13,080.77, 18,051.27 and 7,112.39

Step by Step Solution

1. Step 1: Write the proportion equation
   13,080.77 : 18,051.27 = 7,112.39 : x
2. Step 2: Convert to fraction form
   13,080.77/18,051.27 = 7,112.39/x
3. Step 3: Cross multiply
   13,080.77x = 18,051.27 × 7,112.39
4. Step 4: Simplify right side
   13,080.77x = 128,387,555.31
5. Step 5: Solve for x
   x = 128,387,555.31/13,080.77
6. Step 6: Final answer
   x = 9,814.99