Finding the Fourth Proportional to 9,321.69, 12,863.15 and 5,492.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,321.69 : 12,863.15 = 5,492.72 : x
2. Step 2: Convert to fraction form
   9,321.69/12,863.15 = 5,492.72/x
3. Step 3: Cross multiply
   9,321.69x = 12,863.15 × 5,492.72
4. Step 4: Simplify right side
   9,321.69x = 70,653,589.49
5. Step 5: Solve for x
   x = 70,653,589.49/9,321.69
6. Step 6: Final answer
   x = 7,579.48