Finding the Fourth Proportional to 1,394.63, 1,924.59 and 765.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,394.63 : 1,924.59 = 765.21 : x
2. Step 2: Convert to fraction form
   1,394.63/1,924.59 = 765.21/x
3. Step 3: Cross multiply
   1,394.63x = 1,924.59 × 765.21
4. Step 4: Simplify right side
   1,394.63x = 1,472,720.33
5. Step 5: Solve for x
   x = 1,472,720.33/1,394.63
6. Step 6: Final answer
   x = 1,056.00