Finding the Fourth Proportional to 10,619, 15,930.52 and 5,072.78

Step by Step Solution

1. Step 1: Write the proportion equation
   10,619 : 15,930.52 = 5,072.78 : x
2. Step 2: Convert to fraction form
   10,619/15,930.52 = 5,072.78/x
3. Step 3: Cross multiply
   10,619x = 15,930.52 × 5,072.78
4. Step 4: Simplify right side
   10,619x = 80,812,023.25
5. Step 5: Solve for x
   x = 80,812,023.25/10,619
6. Step 6: Final answer
   x = 7,610.13