Finding the Fourth Proportional to 2,478.60, 3,420.47 and 1,359.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,478.60 : 3,420.47 = 1,359.59 : x
2. Step 2: Convert to fraction form
   2,478.60/3,420.47 = 1,359.59/x
3. Step 3: Cross multiply
   2,478.60x = 3,420.47 × 1,359.59
4. Step 4: Simplify right side
   2,478.60x = 4,650,423.10
5. Step 5: Solve for x
   x = 4,650,423.10/2,478.60
6. Step 6: Final answer
   x = 1,876.23