Finding the Fourth Proportional to 1,394.09, 1,923.89 and 764.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,394.09 : 1,923.89 = 764.59 : x
2. Step 2: Convert to fraction form
   1,394.09/1,923.89 = 764.59/x
3. Step 3: Cross multiply
   1,394.09x = 1,923.89 × 764.59
4. Step 4: Simplify right side
   1,394.09x = 1,470,973.61
5. Step 5: Solve for x
   x = 1,470,973.61/1,394.09
6. Step 6: Final answer
   x = 1,055.15