Finding the Fourth Proportional to 2,077.40, 3,116.61 and 616.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,077.40 : 3,116.61 = 616.56 : x
2. Step 2: Convert to fraction form
   2,077.40/3,116.61 = 616.56/x
3. Step 3: Cross multiply
   2,077.40x = 3,116.61 × 616.56
4. Step 4: Simplify right side
   2,077.40x = 1,921,577.06
5. Step 5: Solve for x
   x = 1,921,577.06/2,077.40
6. Step 6: Final answer
   x = 924.99