Finding the Fourth Proportional to 1,344.98, 1,856.71 and 897.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,344.98 : 1,856.71 = 897.60 : x
2. Step 2: Convert to fraction form
   1,344.98/1,856.71 = 897.60/x
3. Step 3: Cross multiply
   1,344.98x = 1,856.71 × 897.60
4. Step 4: Simplify right side
   1,344.98x = 1,666,580.65
5. Step 5: Solve for x
   x = 1,666,580.65/1,344.98
6. Step 6: Final answer
   x = 1,239.11