Finding the Fourth Proportional to 2,387.34, 3,293.88 and 1,378.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,387.34 : 3,293.88 = 1,378.80 : x
2. Step 2: Convert to fraction form
   2,387.34/3,293.88 = 1,378.80/x
3. Step 3: Cross multiply
   2,387.34x = 3,293.88 × 1,378.80
4. Step 4: Simplify right side
   2,387.34x = 4,541,601.74
5. Step 5: Solve for x
   x = 4,541,601.74/2,387.34
6. Step 6: Final answer
   x = 1,902.37