Finding the Fourth Proportional to 9,923.10, 13,694.18 and 5,447.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,923.10 : 13,694.18 = 5,447.15 : x
2. Step 2: Convert to fraction form
   9,923.10/13,694.18 = 5,447.15/x
3. Step 3: Cross multiply
   9,923.10x = 13,694.18 × 5,447.15
4. Step 4: Simplify right side
   9,923.10x = 74,594,156.88
5. Step 5: Solve for x
   x = 74,594,156.88/9,923.10
6. Step 6: Final answer
   x = 7,517.22