Finding the Fourth Proportional to 2,443.88, 3,664.70 and 1,210.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,443.88 : 3,664.70 = 1,210.80 : x
2. Step 2: Convert to fraction form
   2,443.88/3,664.70 = 1,210.80/x
3. Step 3: Cross multiply
   2,443.88x = 3,664.70 × 1,210.80
4. Step 4: Simplify right side
   2,443.88x = 4,437,218.76
5. Step 5: Solve for x
   x = 4,437,218.76/2,443.88
6. Step 6: Final answer
   x = 1,815.65