Finding the Fourth Proportional to 2,373.83, 3,560.74 and 642.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,373.83 : 3,560.74 = 642.59 : x
2. Step 2: Convert to fraction form
   2,373.83/3,560.74 = 642.59/x
3. Step 3: Cross multiply
   2,373.83x = 3,560.74 × 642.59
4. Step 4: Simplify right side
   2,373.83x = 2,288,074.90
5. Step 5: Solve for x
   x = 2,288,074.90/2,373.83
6. Step 6: Final answer
   x = 963.88