Finding the Fourth Proportional to 2,076.21, 3,115.86 and 980.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,076.21 : 3,115.86 = 980.91 : x
2. Step 2: Convert to fraction form
   2,076.21/3,115.86 = 980.91/x
3. Step 3: Cross multiply
   2,076.21x = 3,115.86 × 980.91
4. Step 4: Simplify right side
   2,076.21x = 3,056,378.23
5. Step 5: Solve for x
   x = 3,056,378.23/2,076.21
6. Step 6: Final answer
   x = 1,472.09