Finding the Fourth Proportional to 142,142.39, 196,159.56 and 78,484.22

Step by Step Solution

1. Step 1: Write the proportion equation
   142,142.39 : 196,159.56 = 78,484.22 : x
2. Step 2: Convert to fraction form
   142,142.39/196,159.56 = 78,484.22/x
3. Step 3: Cross multiply
   142,142.39x = 196,159.56 × 78,484.22
4. Step 4: Simplify right side
   142,142.39x = 15,395,430,062.14
5. Step 5: Solve for x
   x = 15,395,430,062.14/142,142.39
6. Step 6: Final answer
   x = 108,309.91