Finding the Fourth Proportional to 1,362.40, 1,880.15 and 773.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,362.40 : 1,880.15 = 773.02 : x
2. Step 2: Convert to fraction form
   1,362.40/1,880.15 = 773.02/x
3. Step 3: Cross multiply
   1,362.40x = 1,880.15 × 773.02
4. Step 4: Simplify right side
   1,362.40x = 1,453,392.04
5. Step 5: Solve for x
   x = 1,453,392.04/1,362.40
6. Step 6: Final answer
   x = 1,066.79