Finding the Fourth Proportional to 35,974.28, 49,648.20 and 21,638.72

Step by Step Solution

1. Step 1: Write the proportion equation
   35,974.28 : 49,648.20 = 21,638.72 : x
2. Step 2: Convert to fraction form
   35,974.28/49,648.20 = 21,638.72/x
3. Step 3: Cross multiply
   35,974.28x = 49,648.20 × 21,638.72
4. Step 4: Simplify right side
   35,974.28x = 1,074,323,498.30
5. Step 5: Solve for x
   x = 1,074,323,498.30/35,974.28
6. Step 6: Final answer
   x = 29,863.66