Finding the Fourth Proportional to 10,447.57, 15,673.67 and 5,185.45

Step by Step Solution

1. Step 1: Write the proportion equation
   10,447.57 : 15,673.67 = 5,185.45 : x
2. Step 2: Convert to fraction form
   10,447.57/15,673.67 = 5,185.45/x
3. Step 3: Cross multiply
   10,447.57x = 15,673.67 × 5,185.45
4. Step 4: Simplify right side
   10,447.57x = 81,275,032.10
5. Step 5: Solve for x
   x = 81,275,032.10/10,447.57
6. Step 6: Final answer
   x = 7,779.32