Finding the Fourth Proportional to 10,856.38, 16,263.52 and 7,147.44

Step by Step Solution

1. Step 1: Write the proportion equation
   10,856.38 : 16,263.52 = 7,147.44 : x
2. Step 2: Convert to fraction form
   10,856.38/16,263.52 = 7,147.44/x
3. Step 3: Cross multiply
   10,856.38x = 16,263.52 × 7,147.44
4. Step 4: Simplify right side
   10,856.38x = 116,242,533.39
5. Step 5: Solve for x
   x = 116,242,533.39/10,856.38
6. Step 6: Final answer
   x = 10,707.30