Finding the Fourth Proportional to 142,091.84, 196,086.75 and 78,429.65

Step by Step Solution

1. Step 1: Write the proportion equation
   142,091.84 : 196,086.75 = 78,429.65 : x
2. Step 2: Convert to fraction form
   142,091.84/196,086.75 = 78,429.65/x
3. Step 3: Cross multiply
   142,091.84x = 196,086.75 × 78,429.65
4. Step 4: Simplify right side
   142,091.84x = 15,379,014,927.03
5. Step 5: Solve for x
   x = 15,379,014,927.03/142,091.84
6. Step 6: Final answer
   x = 108,232.93