Finding the Fourth Proportional to 10,639, 15,961.86 and 4,796.12

Step by Step Solution

1. Step 1: Write the proportion equation
   10,639 : 15,961.86 = 4,796.12 : x
2. Step 2: Convert to fraction form
   10,639/15,961.86 = 4,796.12/x
3. Step 3: Cross multiply
   10,639x = 15,961.86 × 4,796.12
4. Step 4: Simplify right side
   10,639x = 76,554,995.98
5. Step 5: Solve for x
   x = 76,554,995.98/10,639
6. Step 6: Final answer
   x = 7,195.69