Finding the Fourth Proportional to 2,300.85, 3,175.30 and 1,357.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,300.85 : 3,175.30 = 1,357.20 : x
2. Step 2: Convert to fraction form
   2,300.85/3,175.30 = 1,357.20/x
3. Step 3: Cross multiply
   2,300.85x = 3,175.30 × 1,357.20
4. Step 4: Simplify right side
   2,300.85x = 4,309,506.95
5. Step 5: Solve for x
   x = 4,309,506.95/2,300.85
6. Step 6: Final answer
   x = 1,873.01