Finding the Fourth Proportional to 12,036.80, 18,062.49 and 5,111.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,036.80 : 18,062.49 = 5,111.30 : x
2. Step 2: Convert to fraction form
   12,036.80/18,062.49 = 5,111.30/x
3. Step 3: Cross multiply
   12,036.80x = 18,062.49 × 5,111.30
4. Step 4: Simplify right side
   12,036.80x = 92,322,805.14
5. Step 5: Solve for x
   x = 92,322,805.14/12,036.80
6. Step 6: Final answer
   x = 7,670.05