Finding the Fourth Proportional to 1,352.78, 1,866.78 and 763.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,352.78 : 1,866.78 = 763.37 : x
2. Step 2: Convert to fraction form
   1,352.78/1,866.78 = 763.37/x
3. Step 3: Cross multiply
   1,352.78x = 1,866.78 × 763.37
4. Step 4: Simplify right side
   1,352.78x = 1,425,043.85
5. Step 5: Solve for x
   x = 1,425,043.85/1,352.78
6. Step 6: Final answer
   x = 1,053.42