Finding the Fourth Proportional to 1,960.76, 2,941.50 and 644.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,960.76 : 2,941.50 = 644.59 : x
2. Step 2: Convert to fraction form
   1,960.76/2,941.50 = 644.59/x
3. Step 3: Cross multiply
   1,960.76x = 2,941.50 × 644.59
4. Step 4: Simplify right side
   1,960.76x = 1,896,055.34
5. Step 5: Solve for x
   x = 1,896,055.34/1,960.76
6. Step 6: Final answer
   x = 967.00