Finding the Fourth Proportional to 11,945.63, 17,921.50 and 7,019.42

Step by Step Solution

1. Step 1: Write the proportion equation
   11,945.63 : 17,921.50 = 7,019.42 : x
2. Step 2: Convert to fraction form
   11,945.63/17,921.50 = 7,019.42/x
3. Step 3: Cross multiply
   11,945.63x = 17,921.50 × 7,019.42
4. Step 4: Simplify right side
   11,945.63x = 125,798,428.37
5. Step 5: Solve for x
   x = 125,798,428.37/11,945.63
6. Step 6: Final answer
   x = 10,530.91