Finding the Fourth Proportional to 11,020.82, 15,219.45 and 9,418.01

Step by Step Solution

1. Step 1: Write the proportion equation
   11,020.82 : 15,219.45 = 9,418.01 : x
2. Step 2: Convert to fraction form
   11,020.82/15,219.45 = 9,418.01/x
3. Step 3: Cross multiply
   11,020.82x = 15,219.45 × 9,418.01
4. Step 4: Simplify right side
   11,020.82x = 143,336,856.20
5. Step 5: Solve for x
   x = 143,336,856.20/11,020.82
6. Step 6: Final answer
   x = 13,006.01