Finding the Fourth Proportional to 1,357.20, 1,870.41 and 1,025.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,357.20 : 1,870.41 = 1,025.10 : x
2. Step 2: Convert to fraction form
   1,357.20/1,870.41 = 1,025.10/x
3. Step 3: Cross multiply
   1,357.20x = 1,870.41 × 1,025.10
4. Step 4: Simplify right side
   1,357.20x = 1,917,357.29
5. Step 5: Solve for x
   x = 1,917,357.29/1,357.20
6. Step 6: Final answer
   x = 1,412.73