Finding the Fourth Proportional to 2,429.64, 3,644.91 and 1,390.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,429.64 : 3,644.91 = 1,390.83 : x
2. Step 2: Convert to fraction form
   2,429.64/3,644.91 = 1,390.83/x
3. Step 3: Cross multiply
   2,429.64x = 3,644.91 × 1,390.83
4. Step 4: Simplify right side
   2,429.64x = 5,069,450.18
5. Step 5: Solve for x
   x = 5,069,450.18/2,429.64
6. Step 6: Final answer
   x = 2,086.50