Finding the Fourth Proportional to 13,419.69, 18,519.71 and 7,754.25

Step by Step Solution

1. Step 1: Write the proportion equation
   13,419.69 : 18,519.71 = 7,754.25 : x
2. Step 2: Convert to fraction form
   13,419.69/18,519.71 = 7,754.25/x
3. Step 3: Cross multiply
   13,419.69x = 18,519.71 × 7,754.25
4. Step 4: Simplify right side
   13,419.69x = 143,606,422.50
5. Step 5: Solve for x
   x = 143,606,422.50/13,419.69
6. Step 6: Final answer
   x = 10,701.17