Finding the Fourth Proportional to 2,300.67, 3,171.69 and 1,900.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,300.67 : 3,171.69 = 1,900.80 : x
2. Step 2: Convert to fraction form
   2,300.67/3,171.69 = 1,900.80/x
3. Step 3: Cross multiply
   2,300.67x = 3,171.69 × 1,900.80
4. Step 4: Simplify right side
   2,300.67x = 6,028,748.35
5. Step 5: Solve for x
   x = 6,028,748.35/2,300.67
6. Step 6: Final answer
   x = 2,620.43