Finding the Fourth Proportional to 1,643.45, 2,267.98 and 897.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,643.45 : 2,267.98 = 897.42 : x
2. Step 2: Convert to fraction form
   1,643.45/2,267.98 = 897.42/x
3. Step 3: Cross multiply
   1,643.45x = 2,267.98 × 897.42
4. Step 4: Simplify right side
   1,643.45x = 2,035,328.37
5. Step 5: Solve for x
   x = 2,035,328.37/1,643.45
6. Step 6: Final answer
   x = 1,238.45