Finding the Fourth Proportional to 1,648.72, 2,275.23 and 985.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,648.72 : 2,275.23 = 985.54 : x
2. Step 2: Convert to fraction form
   1,648.72/2,275.23 = 985.54/x
3. Step 3: Cross multiply
   1,648.72x = 2,275.23 × 985.54
4. Step 4: Simplify right side
   1,648.72x = 2,242,330.17
5. Step 5: Solve for x
   x = 2,242,330.17/1,648.72
6. Step 6: Final answer
   x = 1,360.04