Finding the Fourth Proportional to 1,393.59, 1,923.15 and 764.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,393.59 : 1,923.15 = 764.12 : x
2. Step 2: Convert to fraction form
   1,393.59/1,923.15 = 764.12/x
3. Step 3: Cross multiply
   1,393.59x = 1,923.15 × 764.12
4. Step 4: Simplify right side
   1,393.59x = 1,469,515.56
5. Step 5: Solve for x
   x = 1,469,515.56/1,393.59
6. Step 6: Final answer
   x = 1,054.48