Finding the Fourth Proportional to 2,185.53, 3,014.40 and 1,388.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,185.53 : 3,014.40 = 1,388.16 : x
2. Step 2: Convert to fraction form
   2,185.53/3,014.40 = 1,388.16/x
3. Step 3: Cross multiply
   2,185.53x = 3,014.40 × 1,388.16
4. Step 4: Simplify right side
   2,185.53x = 4,184,469.50
5. Step 5: Solve for x
   x = 4,184,469.50/2,185.53
6. Step 6: Final answer
   x = 1,914.62