Finding the Fourth Proportional to 1,362.57, 1,880.40 and 773.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,362.57 : 1,880.40 = 773.07 : x
2. Step 2: Convert to fraction form
   1,362.57/1,880.40 = 773.07/x
3. Step 3: Cross multiply
   1,362.57x = 1,880.40 × 773.07
4. Step 4: Simplify right side
   1,362.57x = 1,453,680.83
5. Step 5: Solve for x
   x = 1,453,680.83/1,362.57
6. Step 6: Final answer
   x = 1,066.87