Finding the Fourth Proportional to 78,142.94, 117,086.27 and 33,128.33

Step by Step Solution

1. Step 1: Write the proportion equation
   78,142.94 : 117,086.27 = 33,128.33 : x
2. Step 2: Convert to fraction form
   78,142.94/117,086.27 = 33,128.33/x
3. Step 3: Cross multiply
   78,142.94x = 117,086.27 × 33,128.33
4. Step 4: Simplify right side
   78,142.94x = 3,878,872,357.21
5. Step 5: Solve for x
   x = 3,878,872,357.21/78,142.94
6. Step 6: Final answer
   x = 49,638.17