Finding the Fourth Proportional to 1,621.82, 2,434.52 and 648.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,621.82 : 2,434.52 = 648.61 : x
2. Step 2: Convert to fraction form
   1,621.82/2,434.52 = 648.61/x
3. Step 3: Cross multiply
   1,621.82x = 2,434.52 × 648.61
4. Step 4: Simplify right side
   1,621.82x = 1,579,049.55
5. Step 5: Solve for x
   x = 1,579,049.55/1,621.82
6. Step 6: Final answer
   x = 973.63