Finding the Fourth Proportional to 2,164.50, 2,987.04 and 1,378.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,164.50 : 2,987.04 = 1,378.38 : x
2. Step 2: Convert to fraction form
   2,164.50/2,987.04 = 1,378.38/x
3. Step 3: Cross multiply
   2,164.50x = 2,987.04 × 1,378.38
4. Step 4: Simplify right side
   2,164.50x = 4,117,276.20
5. Step 5: Solve for x
   x = 4,117,276.20/2,164.50
6. Step 6: Final answer
   x = 1,902.18