Finding the Fourth Proportional to 2,072.84, 3,109.25 and 976.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,072.84 : 3,109.25 = 976.61 : x
2. Step 2: Convert to fraction form
   2,072.84/3,109.25 = 976.61/x
3. Step 3: Cross multiply
   2,072.84x = 3,109.25 × 976.61
4. Step 4: Simplify right side
   2,072.84x = 3,036,504.21
5. Step 5: Solve for x
   x = 3,036,504.21/2,072.84
6. Step 6: Final answer
   x = 1,464.90