Finding the Fourth Proportional to 2,372.86, 3,559.50 and 641.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,372.86 : 3,559.50 = 641.50 : x
2. Step 2: Convert to fraction form
   2,372.86/3,559.50 = 641.50/x
3. Step 3: Cross multiply
   2,372.86x = 3,559.50 × 641.50
4. Step 4: Simplify right side
   2,372.86x = 2,283,419.25
5. Step 5: Solve for x
   x = 2,283,419.25/2,372.86
6. Step 6: Final answer
   x = 962.31