Finding the Fourth Proportional to 1,362.42, 1,880.01 and 772.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,362.42 : 1,880.01 = 772.74 : x
2. Step 2: Convert to fraction form
   1,362.42/1,880.01 = 772.74/x
3. Step 3: Cross multiply
   1,362.42x = 1,880.01 × 772.74
4. Step 4: Simplify right side
   1,362.42x = 1,452,758.93
5. Step 5: Solve for x
   x = 1,452,758.93/1,362.42
6. Step 6: Final answer
   x = 1,066.31