Finding the Fourth Proportional to 142,198.84, 196,233.78 and 78,536.32

Step by Step Solution

1. Step 1: Write the proportion equation
   142,198.84 : 196,233.78 = 78,536.32 : x
2. Step 2: Convert to fraction form
   142,198.84/196,233.78 = 78,536.32/x
3. Step 3: Cross multiply
   142,198.84x = 196,233.78 × 78,536.32
4. Step 4: Simplify right side
   142,198.84x = 15,411,478,940.89
5. Step 5: Solve for x
   x = 15,411,478,940.89/142,198.84
6. Step 6: Final answer
   x = 108,379.78