Finding the Fourth Proportional to 1,377.16, 2,065.56 and 452.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,377.16 : 2,065.56 = 452.56 : x
2. Step 2: Convert to fraction form
   1,377.16/2,065.56 = 452.56/x
3. Step 3: Cross multiply
   1,377.16x = 2,065.56 × 452.56
4. Step 4: Simplify right side
   1,377.16x = 934,789.83
5. Step 5: Solve for x
   x = 934,789.83/1,377.16
6. Step 6: Final answer
   x = 678.78