Finding the Fourth Proportional to 3,664.31, 5,056.71 and 1,985.67

Step by Step Solution

1. Step 1: Write the proportion equation
   3,664.31 : 5,056.71 = 1,985.67 : x
2. Step 2: Convert to fraction form
   3,664.31/5,056.71 = 1,985.67/x
3. Step 3: Cross multiply
   3,664.31x = 5,056.71 × 1,985.67
4. Step 4: Simplify right side
   3,664.31x = 10,040,957.35
5. Step 5: Solve for x
   x = 10,040,957.35/3,664.31
6. Step 6: Final answer
   x = 2,740.21