Finding the Fourth Proportional to 1,641.45, 2,265.15 and 933.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,641.45 : 2,265.15 = 933.31 : x
2. Step 2: Convert to fraction form
   1,641.45/2,265.15 = 933.31/x
3. Step 3: Cross multiply
   1,641.45x = 2,265.15 × 933.31
4. Step 4: Simplify right side
   1,641.45x = 2,114,081.48
5. Step 5: Solve for x
   x = 2,114,081.48/1,641.45
6. Step 6: Final answer
   x = 1,287.94