Finding the Fourth Proportional to 11,012.04, 15,178.84 and 9,019.08

Step by Step Solution

1. Step 1: Write the proportion equation
   11,012.04 : 15,178.84 = 9,019.08 : x
2. Step 2: Convert to fraction form
   11,012.04/15,178.84 = 9,019.08/x
3. Step 3: Cross multiply
   11,012.04x = 15,178.84 × 9,019.08
4. Step 4: Simplify right side
   11,012.04x = 136,899,172.27
5. Step 5: Solve for x
   x = 136,899,172.27/11,012.04
6. Step 6: Final answer
   x = 12,431.77