Finding the Fourth Proportional to 2,375.32, 3,562.56 and 643.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,375.32 : 3,562.56 = 643.72 : x
2. Step 2: Convert to fraction form
   2,375.32/3,562.56 = 643.72/x
3. Step 3: Cross multiply
   2,375.32x = 3,562.56 × 643.72
4. Step 4: Simplify right side
   2,375.32x = 2,293,291.12
5. Step 5: Solve for x
   x = 2,293,291.12/2,375.32
6. Step 6: Final answer
   x = 965.47