Finding the Fourth Proportional to 3,664.15, 5,056.53 and 1,985.57

Step by Step Solution

1. Step 1: Write the proportion equation
   3,664.15 : 5,056.53 = 1,985.57 : x
2. Step 2: Convert to fraction form
   3,664.15/5,056.53 = 1,985.57/x
3. Step 3: Cross multiply
   3,664.15x = 5,056.53 × 1,985.57
4. Step 4: Simplify right side
   3,664.15x = 10,040,080.51
5. Step 5: Solve for x
   x = 10,040,080.51/3,664.15
6. Step 6: Final answer
   x = 2,740.08