Finding the Fourth Proportional to 2,389.78, 3,298.10 and 1,327.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,389.78 : 3,298.10 = 1,327.62 : x
2. Step 2: Convert to fraction form
   2,389.78/3,298.10 = 1,327.62/x
3. Step 3: Cross multiply
   2,389.78x = 3,298.10 × 1,327.62
4. Step 4: Simplify right side
   2,389.78x = 4,378,623.52
5. Step 5: Solve for x
   x = 4,378,623.52/2,389.78
6. Step 6: Final answer
   x = 1,832.23