Finding the Fourth Proportional to 3,967.89, 5,473.47 and 3,686.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,967.89 : 5,473.47 = 3,686.31 : x
2. Step 2: Convert to fraction form
   3,967.89/5,473.47 = 3,686.31/x
3. Step 3: Cross multiply
   3,967.89x = 5,473.47 × 3,686.31
4. Step 4: Simplify right side
   3,967.89x = 20,176,907.20
5. Step 5: Solve for x
   x = 20,176,907.20/3,967.89
6. Step 6: Final answer
   x = 5,085.05