Finding the Fourth Proportional to 1,409.31, 1,944.89 and 779.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,409.31 : 1,944.89 = 779.92 : x
2. Step 2: Convert to fraction form
   1,409.31/1,944.89 = 779.92/x
3. Step 3: Cross multiply
   1,409.31x = 1,944.89 × 779.92
4. Step 4: Simplify right side
   1,409.31x = 1,516,852.77
5. Step 5: Solve for x
   x = 1,516,852.77/1,409.31
6. Step 6: Final answer
   x = 1,076.31