Finding the Fourth Proportional to 1,919.30, 2,645.46 and 1,386.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,919.30 : 2,645.46 = 1,386.32 : x
2. Step 2: Convert to fraction form
   1,919.30/2,645.46 = 1,386.32/x
3. Step 3: Cross multiply
   1,919.30x = 2,645.46 × 1,386.32
4. Step 4: Simplify right side
   1,919.30x = 3,667,440.88
5. Step 5: Solve for x
   x = 3,667,440.88/1,919.30
6. Step 6: Final answer
   x = 1,910.83