Finding the Fourth Proportional to 12,018.51, 18,014.99 and 7,090.47

Step by Step Solution

1. Step 1: Write the proportion equation
   12,018.51 : 18,014.99 = 7,090.47 : x
2. Step 2: Convert to fraction form
   12,018.51/18,014.99 = 7,090.47/x
3. Step 3: Cross multiply
   12,018.51x = 18,014.99 × 7,090.47
4. Step 4: Simplify right side
   12,018.51x = 127,734,746.15
5. Step 5: Solve for x
   x = 127,734,746.15/12,018.51
6. Step 6: Final answer
   x = 10,628.17