Finding the Fourth Proportional to 10,116, 15,172.38 and 7,185.42

Step by Step Solution

1. Step 1: Write the proportion equation
   10,116 : 15,172.38 = 7,185.42 : x
2. Step 2: Convert to fraction form
   10,116/15,172.38 = 7,185.42/x
3. Step 3: Cross multiply
   10,116x = 15,172.38 × 7,185.42
4. Step 4: Simplify right side
   10,116x = 109,019,922.70
5. Step 5: Solve for x
   x = 109,019,922.70/10,116
6. Step 6: Final answer
   x = 10,776.98