Finding the Fourth Proportional to 1,362.30, 1,879.89 and 764.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,362.30 : 1,879.89 = 764.76 : x
2. Step 2: Convert to fraction form
   1,362.30/1,879.89 = 764.76/x
3. Step 3: Cross multiply
   1,362.30x = 1,879.89 × 764.76
4. Step 4: Simplify right side
   1,362.30x = 1,437,664.68
5. Step 5: Solve for x
   x = 1,437,664.68/1,362.30
6. Step 6: Final answer
   x = 1,055.32