Finding the Fourth Proportional to 1,380.42, 2,070.94 and 650.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,380.42 : 2,070.94 = 650.82 : x
2. Step 2: Convert to fraction form
   1,380.42/2,070.94 = 650.82/x
3. Step 3: Cross multiply
   1,380.42x = 2,070.94 × 650.82
4. Step 4: Simplify right side
   1,380.42x = 1,347,809.17
5. Step 5: Solve for x
   x = 1,347,809.17/1,380.42
6. Step 6: Final answer
   x = 976.38