Finding the Fourth Proportional to 2,071.80, 3,109.71 and 976.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,071.80 : 3,109.71 = 976.92 : x
2. Step 2: Convert to fraction form
   2,071.80/3,109.71 = 976.92/x
3. Step 3: Cross multiply
   2,071.80x = 3,109.71 × 976.92
4. Step 4: Simplify right side
   2,071.80x = 3,037,937.89
5. Step 5: Solve for x
   x = 3,037,937.89/2,071.80
6. Step 6: Final answer
   x = 1,466.33