Finding the Fourth Proportional to 1,345.35, 1,857.25 and 897.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.35 : 1,857.25 = 897.96 : x
2. Step 2: Convert to fraction form
   1,345.35/1,857.25 = 897.96/x
3. Step 3: Cross multiply
   1,345.35x = 1,857.25 × 897.96
4. Step 4: Simplify right side
   1,345.35x = 1,667,744.30
5. Step 5: Solve for x
   x = 1,667,744.30/1,345.35
6. Step 6: Final answer
   x = 1,239.63