Finding the Fourth Proportional to 1,216.04, 1,677.83 and 684.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,216.04 : 1,677.83 = 684.81 : x
2. Step 2: Convert to fraction form
   1,216.04/1,677.83 = 684.81/x
3. Step 3: Cross multiply
   1,216.04x = 1,677.83 × 684.81
4. Step 4: Simplify right side
   1,216.04x = 1,148,997.24
5. Step 5: Solve for x
   x = 1,148,997.24/1,216.04
6. Step 6: Final answer
   x = 944.87