Finding the Fourth Proportional to 2,077.72, 3,116.59 and 616.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,077.72 : 3,116.59 = 616.88 : x
2. Step 2: Convert to fraction form
   2,077.72/3,116.59 = 616.88/x
3. Step 3: Cross multiply
   2,077.72x = 3,116.59 × 616.88
4. Step 4: Simplify right side
   2,077.72x = 1,922,558.95
5. Step 5: Solve for x
   x = 1,922,558.95/2,077.72
6. Step 6: Final answer
   x = 925.32