Finding the Fourth Proportional to 10,619.16, 15,849.18 and 10,443.98

Step by Step Solution

1. Step 1: Write the proportion equation
   10,619.16 : 15,849.18 = 10,443.98 : x
2. Step 2: Convert to fraction form
   10,619.16/15,849.18 = 10,443.98/x
3. Step 3: Cross multiply
   10,619.16x = 15,849.18 × 10,443.98
4. Step 4: Simplify right side
   10,619.16x = 165,528,439.69
5. Step 5: Solve for x
   x = 165,528,439.69/10,619.16
6. Step 6: Final answer
   x = 15,587.72