Finding the Fourth Proportional to 2,077.09, 3,116.10 and 690.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,077.09 : 3,116.10 = 690.31 : x
2. Step 2: Convert to fraction form
   2,077.09/3,116.10 = 690.31/x
3. Step 3: Cross multiply
   2,077.09x = 3,116.10 × 690.31
4. Step 4: Simplify right side
   2,077.09x = 2,151,081.47
5. Step 5: Solve for x
   x = 2,151,081.47/2,077.09
6. Step 6: Final answer
   x = 1,035.62