Finding the Fourth Proportional to 142,743.58, 196,994.39 and 78,212.93

Step by Step Solution

1. Step 1: Write the proportion equation
   142,743.58 : 196,994.39 = 78,212.93 : x
2. Step 2: Convert to fraction form
   142,743.58/196,994.39 = 78,212.93/x
3. Step 3: Cross multiply
   142,743.58x = 196,994.39 × 78,212.93
4. Step 4: Simplify right side
   142,743.58x = 15,407,508,536.88
5. Step 5: Solve for x
   x = 15,407,508,536.88/142,743.58
6. Step 6: Final answer
   x = 107,938.37