Finding the Fourth Proportional to 2,387.30, 3,294.04 and 1,378.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,387.30 : 3,294.04 = 1,378.77 : x
2. Step 2: Convert to fraction form
   2,387.30/3,294.04 = 1,378.77/x
3. Step 3: Cross multiply
   2,387.30x = 3,294.04 × 1,378.77
4. Step 4: Simplify right side
   2,387.30x = 4,541,732.72
5. Step 5: Solve for x
   x = 4,541,732.72/2,387.30
6. Step 6: Final answer
   x = 1,902.46