Finding the Fourth Proportional to 1,273.98, 1,757.37 and 776.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,273.98 : 1,757.37 = 776.34 : x
2. Step 2: Convert to fraction form
   1,273.98/1,757.37 = 776.34/x
3. Step 3: Cross multiply
   1,273.98x = 1,757.37 × 776.34
4. Step 4: Simplify right side
   1,273.98x = 1,364,316.63
5. Step 5: Solve for x
   x = 1,364,316.63/1,273.98
6. Step 6: Final answer
   x = 1,070.91