Finding the Fourth Proportional to 2,077.68, 3,115.89 and 980.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,077.68 : 3,115.89 = 980.94 : x
2. Step 2: Convert to fraction form
   2,077.68/3,115.89 = 980.94/x
3. Step 3: Cross multiply
   2,077.68x = 3,115.89 × 980.94
4. Step 4: Simplify right side
   2,077.68x = 3,056,501.14
5. Step 5: Solve for x
   x = 3,056,501.14/2,077.68
6. Step 6: Final answer
   x = 1,471.11