Finding the Fourth Proportional to 142,181.86, 196,209.38 and 78,518.38

Step by Step Solution

1. Step 1: Write the proportion equation
   142,181.86 : 196,209.38 = 78,518.38 : x
2. Step 2: Convert to fraction form
   142,181.86/196,209.38 = 78,518.38/x
3. Step 3: Cross multiply
   142,181.86x = 196,209.38 × 78,518.38
4. Step 4: Simplify right side
   142,181.86x = 15,406,042,658.40
5. Step 5: Solve for x
   x = 15,406,042,658.40/142,181.86
6. Step 6: Final answer
   x = 108,354.49