Finding the Fourth Proportional to 12,018.88, 18,015.56 and 7,090.84

Step by Step Solution

1. Step 1: Write the proportion equation
   12,018.88 : 18,015.56 = 7,090.84 : x
2. Step 2: Convert to fraction form
   12,018.88/18,015.56 = 7,090.84/x
3. Step 3: Cross multiply
   12,018.88x = 18,015.56 × 7,090.84
4. Step 4: Simplify right side
   12,018.88x = 127,745,418.02
5. Step 5: Solve for x
   x = 127,745,418.02/12,018.88
6. Step 6: Final answer
   x = 10,628.73