Finding the Fourth Proportional to 11,150.54, 15,398.12 and 7,178.54

Step by Step Solution

1. Step 1: Write the proportion equation
   11,150.54 : 15,398.12 = 7,178.54 : x
2. Step 2: Convert to fraction form
   11,150.54/15,398.12 = 7,178.54/x
3. Step 3: Cross multiply
   11,150.54x = 15,398.12 × 7,178.54
4. Step 4: Simplify right side
   11,150.54x = 110,536,020.34
5. Step 5: Solve for x
   x = 110,536,020.34/11,150.54
6. Step 6: Final answer
   x = 9,913.06