Finding the Fourth Proportional to 1,392.83, 1,922.10 and 763.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,392.83 : 1,922.10 = 763.34 : x
2. Step 2: Convert to fraction form
   1,392.83/1,922.10 = 763.34/x
3. Step 3: Cross multiply
   1,392.83x = 1,922.10 × 763.34
4. Step 4: Simplify right side
   1,392.83x = 1,467,220.59
5. Step 5: Solve for x
   x = 1,467,220.59/1,392.83
6. Step 6: Final answer
   x = 1,053.41