Finding the Fourth Proportional to 12,012.31, 18,014.82 and 7,080.63

Step by Step Solution

1. Step 1: Write the proportion equation
   12,012.31 : 18,014.82 = 7,080.63 : x
2. Step 2: Convert to fraction form
   12,012.31/18,014.82 = 7,080.63/x
3. Step 3: Cross multiply
   12,012.31x = 18,014.82 × 7,080.63
4. Step 4: Simplify right side
   12,012.31x = 127,556,274.94
5. Step 5: Solve for x
   x = 127,556,274.94/12,012.31
6. Step 6: Final answer
   x = 10,618.80