Finding the Fourth Proportional to 1,392.67, 1,921.82 and 763.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,392.67 : 1,921.82 = 763.23 : x
2. Step 2: Convert to fraction form
   1,392.67/1,921.82 = 763.23/x
3. Step 3: Cross multiply
   1,392.67x = 1,921.82 × 763.23
4. Step 4: Simplify right side
   1,392.67x = 1,466,792.59
5. Step 5: Solve for x
   x = 1,466,792.59/1,392.67
6. Step 6: Final answer
   x = 1,053.23