Finding the Fourth Proportional to 2,374, 3,560.72 and 642.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,374 : 3,560.72 = 642.76 : x
2. Step 2: Convert to fraction form
   2,374/3,560.72 = 642.76/x
3. Step 3: Cross multiply
   2,374x = 3,560.72 × 642.76
4. Step 4: Simplify right side
   2,374x = 2,288,688.39
5. Step 5: Solve for x
   x = 2,288,688.39/2,374
6. Step 6: Final answer
   x = 964.06