Finding the Fourth Proportional to 1,394.10, 1,923.89 and 764.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,394.10 : 1,923.89 = 764.69 : x
2. Step 2: Convert to fraction form
   1,394.10/1,923.89 = 764.69/x
3. Step 3: Cross multiply
   1,394.10x = 1,923.89 × 764.69
4. Step 4: Simplify right side
   1,394.10x = 1,471,170.81
5. Step 5: Solve for x
   x = 1,471,170.81/1,394.10
6. Step 6: Final answer
   x = 1,055.28