Finding the Fourth Proportional to 142,116.68, 196,115.86 and 78,453.12

Step by Step Solution

1. Step 1: Write the proportion equation
   142,116.68 : 196,115.86 = 78,453.12 : x
2. Step 2: Convert to fraction form
   142,116.68/196,115.86 = 78,453.12/x
3. Step 3: Cross multiply
   142,116.68x = 196,115.86 × 78,453.12
4. Step 4: Simplify right side
   142,116.68x = 15,385,901,098.48
5. Step 5: Solve for x
   x = 15,385,901,098.48/142,116.68
6. Step 6: Final answer
   x = 108,262.46