Finding the Fourth Proportional to 3,686.86, 5,535.83 and 3,172.46

Step by Step Solution

1. Step 1: Write the proportion equation
   3,686.86 : 5,535.83 = 3,172.46 : x
2. Step 2: Convert to fraction form
   3,686.86/5,535.83 = 3,172.46/x
3. Step 3: Cross multiply
   3,686.86x = 5,535.83 × 3,172.46
4. Step 4: Simplify right side
   3,686.86x = 17,562,199.24
5. Step 5: Solve for x
   x = 17,562,199.24/3,686.86
6. Step 6: Final answer
   x = 4,763.46