Finding the Fourth Proportional to 1,370.98, 1,891.76 and 773.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,370.98 : 1,891.76 = 773.50 : x
2. Step 2: Convert to fraction form
   1,370.98/1,891.76 = 773.50/x
3. Step 3: Cross multiply
   1,370.98x = 1,891.76 × 773.50
4. Step 4: Simplify right side
   1,370.98x = 1,463,271.31
5. Step 5: Solve for x
   x = 1,463,271.31/1,370.98
6. Step 6: Final answer
   x = 1,067.32