Finding the Fourth Proportional to 1,606.73, 2,217.31 and 977.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,606.73 : 2,217.31 = 977.15 : x
2. Step 2: Convert to fraction form
   1,606.73/2,217.31 = 977.15/x
3. Step 3: Cross multiply
   1,606.73x = 2,217.31 × 977.15
4. Step 4: Simplify right side
   1,606.73x = 2,166,647.57
5. Step 5: Solve for x
   x = 2,166,647.57/1,606.73
6. Step 6: Final answer
   x = 1,348.49