Finding the Fourth Proportional to 2,077.55, 3,116.83 and 690.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,077.55 : 3,116.83 = 690.88 : x
2. Step 2: Convert to fraction form
   2,077.55/3,116.83 = 690.88/x
3. Step 3: Cross multiply
   2,077.55x = 3,116.83 × 690.88
4. Step 4: Simplify right side
   2,077.55x = 2,153,353.13
5. Step 5: Solve for x
   x = 2,153,353.13/2,077.55
6. Step 6: Final answer
   x = 1,036.49