Finding the Fourth Proportional to 1,380.72, 2,071.05 and 650.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,380.72 : 2,071.05 = 650.82 : x
2. Step 2: Convert to fraction form
   1,380.72/2,071.05 = 650.82/x
3. Step 3: Cross multiply
   1,380.72x = 2,071.05 × 650.82
4. Step 4: Simplify right side
   1,380.72x = 1,347,880.76
5. Step 5: Solve for x
   x = 1,347,880.76/1,380.72
6. Step 6: Final answer
   x = 976.22