Finding the Fourth Proportional to 2,405.68, 3,320.72 and 1,411.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,405.68 : 3,320.72 = 1,411.80 : x
2. Step 2: Convert to fraction form
   2,405.68/3,320.72 = 1,411.80/x
3. Step 3: Cross multiply
   2,405.68x = 3,320.72 × 1,411.80
4. Step 4: Simplify right side
   2,405.68x = 4,688,192.50
5. Step 5: Solve for x
   x = 4,688,192.50/2,405.68
6. Step 6: Final answer
   x = 1,948.80