Finding the Fourth Proportional to 142,078.29, 196,067.63 and 78,415.63

Step by Step Solution

1. Step 1: Write the proportion equation
   142,078.29 : 196,067.63 = 78,415.63 : x
2. Step 2: Convert to fraction form
   142,078.29/196,067.63 = 78,415.63/x
3. Step 3: Cross multiply
   142,078.29x = 196,067.63 × 78,415.63
4. Step 4: Simplify right side
   142,078.29x = 15,374,765,748.72
5. Step 5: Solve for x
   x = 15,374,765,748.72/142,078.29
6. Step 6: Final answer
   x = 108,213.34