Finding the Fourth Proportional to 1,641.55, 2,265.25 and 933.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,641.55 : 2,265.25 = 933.30 : x
2. Step 2: Convert to fraction form
   1,641.55/2,265.25 = 933.30/x
3. Step 3: Cross multiply
   1,641.55x = 2,265.25 × 933.30
4. Step 4: Simplify right side
   1,641.55x = 2,114,144.17
5. Step 5: Solve for x
   x = 2,114,144.17/1,641.55
6. Step 6: Final answer
   x = 1,287.90