Finding the Fourth Proportional to 11,945.72, 16,477.47 and 9,427.02

Step by Step Solution

1. Step 1: Write the proportion equation
   11,945.72 : 16,477.47 = 9,427.02 : x
2. Step 2: Convert to fraction form
   11,945.72/16,477.47 = 9,427.02/x
3. Step 3: Cross multiply
   11,945.72x = 16,477.47 × 9,427.02
4. Step 4: Simplify right side
   11,945.72x = 155,333,439.24
5. Step 5: Solve for x
   x = 155,333,439.24/11,945.72
6. Step 6: Final answer
   x = 13,003.28