Finding the Fourth Proportional to 2,173.83, 3,260.86 and 613.95

Step by Step Solution

1. Step 1: Write the proportion equation
   2,173.83 : 3,260.86 = 613.95 : x
2. Step 2: Convert to fraction form
   2,173.83/3,260.86 = 613.95/x
3. Step 3: Cross multiply
   2,173.83x = 3,260.86 × 613.95
4. Step 4: Simplify right side
   2,173.83x = 2,002,003.46
5. Step 5: Solve for x
   x = 2,002,003.46/2,173.83
6. Step 6: Final answer
   x = 920.96