Finding the Fourth Proportional to 10,116.38, 15,146.25 and 7,643.42

Step by Step Solution

1. Step 1: Write the proportion equation
   10,116.38 : 15,146.25 = 7,643.42 : x
2. Step 2: Convert to fraction form
   10,116.38/15,146.25 = 7,643.42/x
3. Step 3: Cross multiply
   10,116.38x = 15,146.25 × 7,643.42
4. Step 4: Simplify right side
   10,116.38x = 115,769,150.18
5. Step 5: Solve for x
   x = 115,769,150.18/10,116.38
6. Step 6: Final answer
   x = 11,443.73