Finding the Fourth Proportional to 2,478.33, 3,420.15 and 1,359.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,478.33 : 3,420.15 = 1,359.21 : x
2. Step 2: Convert to fraction form
   2,478.33/3,420.15 = 1,359.21/x
3. Step 3: Cross multiply
   2,478.33x = 3,420.15 × 1,359.21
4. Step 4: Simplify right side
   2,478.33x = 4,648,684.78
5. Step 5: Solve for x
   x = 4,648,684.78/2,478.33
6. Step 6: Final answer
   x = 1,875.73