Finding the Fourth Proportional to 1,353.32, 1,855.92 and 1,297.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,353.32 : 1,855.92 = 1,297.20 : x
2. Step 2: Convert to fraction form
   1,353.32/1,855.92 = 1,297.20/x
3. Step 3: Cross multiply
   1,353.32x = 1,855.92 × 1,297.20
4. Step 4: Simplify right side
   1,353.32x = 2,407,499.42
5. Step 5: Solve for x
   x = 2,407,499.42/1,353.32
6. Step 6: Final answer
   x = 1,778.96