Finding the Fourth Proportional to 11,447.90, 17,139.42 and 7,277.54

Step by Step Solution

1. Step 1: Write the proportion equation
   11,447.90 : 17,139.42 = 7,277.54 : x
2. Step 2: Convert to fraction form
   11,447.90/17,139.42 = 7,277.54/x
3. Step 3: Cross multiply
   11,447.90x = 17,139.42 × 7,277.54
4. Step 4: Simplify right side
   11,447.90x = 124,732,814.63
5. Step 5: Solve for x
   x = 124,732,814.63/11,447.90
6. Step 6: Final answer
   x = 10,895.69