Finding the Fourth Proportional to 1,549.31, 2,138.05 and 850.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,549.31 : 2,138.05 = 850.73 : x
2. Step 2: Convert to fraction form
   1,549.31/2,138.05 = 850.73/x
3. Step 3: Cross multiply
   1,549.31x = 2,138.05 × 850.73
4. Step 4: Simplify right side
   1,549.31x = 1,818,909.69
5. Step 5: Solve for x
   x = 1,818,909.69/1,549.31
6. Step 6: Final answer
   x = 1,174.01