Finding the Fourth Proportional to 2,478.89, 3,420.89 and 1,359.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,478.89 : 3,420.89 = 1,359.84 : x
2. Step 2: Convert to fraction form
   2,478.89/3,420.89 = 1,359.84/x
3. Step 3: Cross multiply
   2,478.89x = 3,420.89 × 1,359.84
4. Step 4: Simplify right side
   2,478.89x = 4,651,856.26
5. Step 5: Solve for x
   x = 4,651,856.26/2,478.89
6. Step 6: Final answer
   x = 1,876.59