Finding the Fourth Proportional to 1,345.61, 1,855.98 and 897.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.61 : 1,855.98 = 897.28 : x
2. Step 2: Convert to fraction form
   1,345.61/1,855.98 = 897.28/x
3. Step 3: Cross multiply
   1,345.61x = 1,855.98 × 897.28
4. Step 4: Simplify right side
   1,345.61x = 1,665,329.09
5. Step 5: Solve for x
   x = 1,665,329.09/1,345.61
6. Step 6: Final answer
   x = 1,237.60