Finding the Fourth Proportional to 11,431.04, 15,774.72 and 7,242.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,431.04 : 15,774.72 = 7,242.72 : x
2. Step 2: Convert to fraction form
   11,431.04/15,774.72 = 7,242.72/x
3. Step 3: Cross multiply
   11,431.04x = 15,774.72 × 7,242.72
4. Step 4: Simplify right side
   11,431.04x = 114,251,880.04
5. Step 5: Solve for x
   x = 114,251,880.04/11,431.04
6. Step 6: Final answer
   x = 9,994.88