Finding the Fourth Proportional to 1,648.74, 2,274.96 and 985.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,648.74 : 2,274.96 = 985.56 : x
2. Step 2: Convert to fraction form
   1,648.74/2,274.96 = 985.56/x
3. Step 3: Cross multiply
   1,648.74x = 2,274.96 × 985.56
4. Step 4: Simplify right side
   1,648.74x = 2,242,109.58
5. Step 5: Solve for x
   x = 2,242,109.58/1,648.74
6. Step 6: Final answer
   x = 1,359.89