Finding the Fourth Proportional to 10,515.43, 15,776.56 and 7,019.65

Step by Step Solution

1. Step 1: Write the proportion equation
   10,515.43 : 15,776.56 = 7,019.65 : x
2. Step 2: Convert to fraction form
   10,515.43/15,776.56 = 7,019.65/x
3. Step 3: Cross multiply
   10,515.43x = 15,776.56 × 7,019.65
4. Step 4: Simplify right side
   10,515.43x = 110,745,850.52
5. Step 5: Solve for x
   x = 110,745,850.52/10,515.43
6. Step 6: Final answer
   x = 10,531.75