Finding the Fourth Proportional to 1,381.50, 2,073.33 and 804.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,381.50 : 2,073.33 = 804.78 : x
2. Step 2: Convert to fraction form
   1,381.50/2,073.33 = 804.78/x
3. Step 3: Cross multiply
   1,381.50x = 2,073.33 × 804.78
4. Step 4: Simplify right side
   1,381.50x = 1,668,574.52
5. Step 5: Solve for x
   x = 1,668,574.52/1,381.50
6. Step 6: Final answer
   x = 1,207.80