Finding the Fourth Proportional to 81,128.57, 121,736.41 and 33,776.34

Step by Step Solution

1. Step 1: Write the proportion equation
   81,128.57 : 121,736.41 = 33,776.34 : x
2. Step 2: Convert to fraction form
   81,128.57/121,736.41 = 33,776.34/x
3. Step 3: Cross multiply
   81,128.57x = 121,736.41 × 33,776.34
4. Step 4: Simplify right side
   81,128.57x = 4,111,810,708.35
5. Step 5: Solve for x
   x = 4,111,810,708.35/81,128.57
6. Step 6: Final answer
   x = 50,682.65