Finding the Fourth Proportional to 12,435.77, 18,653.49 and 5,040.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,435.77 : 18,653.49 = 5,040.15 : x
2. Step 2: Convert to fraction form
   12,435.77/18,653.49 = 5,040.15/x
3. Step 3: Cross multiply
   12,435.77x = 18,653.49 × 5,040.15
4. Step 4: Simplify right side
   12,435.77x = 94,016,387.62
5. Step 5: Solve for x
   x = 94,016,387.62/12,435.77
6. Step 6: Final answer
   x = 7,560.16