Finding the Fourth Proportional to 3,852.18, 5,315.89 and 2,173.57

Step by Step Solution

1. Step 1: Write the proportion equation
   3,852.18 : 5,315.89 = 2,173.57 : x
2. Step 2: Convert to fraction form
   3,852.18/5,315.89 = 2,173.57/x
3. Step 3: Cross multiply
   3,852.18x = 5,315.89 × 2,173.57
4. Step 4: Simplify right side
   3,852.18x = 11,554,459.03
5. Step 5: Solve for x
   x = 11,554,459.03/3,852.18
6. Step 6: Final answer
   x = 2,999.46