Finding the Fourth Proportional to 1,392.99, 1,922.30 and 763.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,392.99 : 1,922.30 = 763.50 : x
2. Step 2: Convert to fraction form
   1,392.99/1,922.30 = 763.50/x
3. Step 3: Cross multiply
   1,392.99x = 1,922.30 × 763.50
4. Step 4: Simplify right side
   1,392.99x = 1,467,676.05
5. Step 5: Solve for x
   x = 1,467,676.05/1,392.99
6. Step 6: Final answer
   x = 1,053.62