Finding the Fourth Proportional to 1,900.30, 2,849.10 and 859.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,900.30 : 2,849.10 = 859.45 : x
2. Step 2: Convert to fraction form
   1,900.30/2,849.10 = 859.45/x
3. Step 3: Cross multiply
   1,900.30x = 2,849.10 × 859.45
4. Step 4: Simplify right side
   1,900.30x = 2,448,659.00
5. Step 5: Solve for x
   x = 2,448,659.00/1,900.30
6. Step 6: Final answer
   x = 1,288.56