Finding the Fourth Proportional to 1,369.65, 1,890.51 and 896.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,369.65 : 1,890.51 = 896.72 : x
2. Step 2: Convert to fraction form
   1,369.65/1,890.51 = 896.72/x
3. Step 3: Cross multiply
   1,369.65x = 1,890.51 × 896.72
4. Step 4: Simplify right side
   1,369.65x = 1,695,245.31
5. Step 5: Solve for x
   x = 1,695,245.31/1,369.65
6. Step 6: Final answer
   x = 1,237.72