Finding the Fourth Proportional to 1,078.06, 1,487.28 and 684.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,078.06 : 1,487.28 = 684.94 : x
2. Step 2: Convert to fraction form
   1,078.06/1,487.28 = 684.94/x
3. Step 3: Cross multiply
   1,078.06x = 1,487.28 × 684.94
4. Step 4: Simplify right side
   1,078.06x = 1,018,697.56
5. Step 5: Solve for x
   x = 1,018,697.56/1,078.06
6. Step 6: Final answer
   x = 944.94