Finding the Fourth Proportional to 10,928.17, 16,394.69 and 3,136.39

Step by Step Solution

1. Step 1: Write the proportion equation
   10,928.17 : 16,394.69 = 3,136.39 : x
2. Step 2: Convert to fraction form
   10,928.17/16,394.69 = 3,136.39/x
3. Step 3: Cross multiply
   10,928.17x = 16,394.69 × 3,136.39
4. Step 4: Simplify right side
   10,928.17x = 51,420,141.77
5. Step 5: Solve for x
   x = 51,420,141.77/10,928.17
6. Step 6: Final answer
   x = 4,705.28