Finding the Fourth Proportional to 1,265.51, 1,897.89 and 443.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,265.51 : 1,897.89 = 443.63 : x
2. Step 2: Convert to fraction form
   1,265.51/1,897.89 = 443.63/x
3. Step 3: Cross multiply
   1,265.51x = 1,897.89 × 443.63
4. Step 4: Simplify right side
   1,265.51x = 841,960.94
5. Step 5: Solve for x
   x = 841,960.94/1,265.51
6. Step 6: Final answer
   x = 665.31