Finding the Fourth Proportional to 2,478.67, 3,420.43 and 1,359.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,478.67 : 3,420.43 = 1,359.59 : x
2. Step 2: Convert to fraction form
   2,478.67/3,420.43 = 1,359.59/x
3. Step 3: Cross multiply
   2,478.67x = 3,420.43 × 1,359.59
4. Step 4: Simplify right side
   2,478.67x = 4,650,361.92
5. Step 5: Solve for x
   x = 4,650,361.92/2,478.67
6. Step 6: Final answer
   x = 1,876.15