Finding the Fourth Proportional to 1,392.84, 1,922.12 and 763.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,392.84 : 1,922.12 = 763.37 : x
2. Step 2: Convert to fraction form
   1,392.84/1,922.12 = 763.37/x
3. Step 3: Cross multiply
   1,392.84x = 1,922.12 × 763.37
4. Step 4: Simplify right side
   1,392.84x = 1,467,275.32
5. Step 5: Solve for x
   x = 1,467,275.32/1,392.84
6. Step 6: Final answer
   x = 1,053.44