Finding the Fourth Proportional to 9,945.69, 14,919.90 and 5,012.64

Step by Step Solution

1. Step 1: Write the proportion equation
   9,945.69 : 14,919.90 = 5,012.64 : x
2. Step 2: Convert to fraction form
   9,945.69/14,919.90 = 5,012.64/x
3. Step 3: Cross multiply
   9,945.69x = 14,919.90 × 5,012.64
4. Step 4: Simplify right side
   9,945.69x = 74,788,087.54
5. Step 5: Solve for x
   x = 74,788,087.54/9,945.69
6. Step 6: Final answer
   x = 7,519.65