Finding the Fourth Proportional to 1,433.65, 1,978.46 and 936.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,433.65 : 1,978.46 = 936.01 : x
2. Step 2: Convert to fraction form
   1,433.65/1,978.46 = 936.01/x
3. Step 3: Cross multiply
   1,433.65x = 1,978.46 × 936.01
4. Step 4: Simplify right side
   1,433.65x = 1,851,858.34
5. Step 5: Solve for x
   x = 1,851,858.34/1,433.65
6. Step 6: Final answer
   x = 1,291.71