Finding the Fourth Proportional to 35,640, 49,196.16 and 20,736

Step by Step Solution

1. Step 1: Write the proportion equation
   35,640 : 49,196.16 = 20,736 : x
2. Step 2: Convert to fraction form
   35,640/49,196.16 = 20,736/x
3. Step 3: Cross multiply
   35,640x = 49,196.16 × 20,736
4. Step 4: Simplify right side
   35,640x = 1,020,131,573.76
5. Step 5: Solve for x
   x = 1,020,131,573.76/35,640
6. Step 6: Final answer
   x = 28,623.22