Finding the Fourth Proportional to 142,109.29, 196,111.29 and 78,446.94

Step by Step Solution

1. Step 1: Write the proportion equation
   142,109.29 : 196,111.29 = 78,446.94 : x
2. Step 2: Convert to fraction form
   142,109.29/196,111.29 = 78,446.94/x
3. Step 3: Cross multiply
   142,109.29x = 196,111.29 × 78,446.94
4. Step 4: Simplify right side
   142,109.29x = 15,384,330,599.95
5. Step 5: Solve for x
   x = 15,384,330,599.95/142,109.29
6. Step 6: Final answer
   x = 108,257.04