Finding the Fourth Proportional to 11,278.98, 15,548.69 and 7,911.34

Step by Step Solution

1. Step 1: Write the proportion equation
   11,278.98 : 15,548.69 = 7,911.34 : x
2. Step 2: Convert to fraction form
   11,278.98/15,548.69 = 7,911.34/x
3. Step 3: Cross multiply
   11,278.98x = 15,548.69 × 7,911.34
4. Step 4: Simplify right side
   11,278.98x = 123,010,954.05
5. Step 5: Solve for x
   x = 123,010,954.05/11,278.98
6. Step 6: Final answer
   x = 10,906.21