Finding the Fourth Proportional to 1,900.45, 2,619.71 and 1,339.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,900.45 : 2,619.71 = 1,339.33 : x
2. Step 2: Convert to fraction form
   1,900.45/2,619.71 = 1,339.33/x
3. Step 3: Cross multiply
   1,900.45x = 2,619.71 × 1,339.33
4. Step 4: Simplify right side
   1,900.45x = 3,508,636.40
5. Step 5: Solve for x
   x = 3,508,636.40/1,900.45
6. Step 6: Final answer
   x = 1,846.21