Finding the Fourth Proportional to 2,173.31, 3,259.61 and 613.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,173.31 : 3,259.61 = 613.42 : x
2. Step 2: Convert to fraction form
   2,173.31/3,259.61 = 613.42/x
3. Step 3: Cross multiply
   2,173.31x = 3,259.61 × 613.42
4. Step 4: Simplify right side
   2,173.31x = 1,999,509.97
5. Step 5: Solve for x
   x = 1,999,509.97/2,173.31
6. Step 6: Final answer
   x = 920.03