Finding the Fourth Proportional to 1,415.94, 1,949.12 and 1,226.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,415.94 : 1,949.12 = 1,226.82 : x
2. Step 2: Convert to fraction form
   1,415.94/1,949.12 = 1,226.82/x
3. Step 3: Cross multiply
   1,415.94x = 1,949.12 × 1,226.82
4. Step 4: Simplify right side
   1,415.94x = 2,391,219.40
5. Step 5: Solve for x
   x = 2,391,219.40/1,415.94
6. Step 6: Final answer
   x = 1,688.79