Finding the Fourth Proportional to 142,081.43, 196,058.41 and 78,415.12

Step by Step Solution

1. Step 1: Write the proportion equation
   142,081.43 : 196,058.41 = 78,415.12 : x
2. Step 2: Convert to fraction form
   142,081.43/196,058.41 = 78,415.12/x
3. Step 3: Cross multiply
   142,081.43x = 196,058.41 × 78,415.12
4. Step 4: Simplify right side
   142,081.43x = 15,373,943,796.19
5. Step 5: Solve for x
   x = 15,373,943,796.19/142,081.43
6. Step 6: Final answer
   x = 108,205.16