Finding the Fourth Proportional to 11,012.04, 15,189.12 and 7,235.28

Step by Step Solution

1. Step 1: Write the proportion equation
   11,012.04 : 15,189.12 = 7,235.28 : x
2. Step 2: Convert to fraction form
   11,012.04/15,189.12 = 7,235.28/x
3. Step 3: Cross multiply
   11,012.04x = 15,189.12 × 7,235.28
4. Step 4: Simplify right side
   11,012.04x = 109,897,536.15
5. Step 5: Solve for x
   x = 109,897,536.15/11,012.04
6. Step 6: Final answer
   x = 9,979.76