Finding the Fourth Proportional to 142,365, 196,446.65 and 78,694.14

Step by Step Solution

1. Step 1: Write the proportion equation
   142,365 : 196,446.65 = 78,694.14 : x
2. Step 2: Convert to fraction form
   142,365/196,446.65 = 78,694.14/x
3. Step 3: Cross multiply
   142,365x = 196,446.65 × 78,694.14
4. Step 4: Simplify right side
   142,365x = 15,459,199,784.16
5. Step 5: Solve for x
   x = 15,459,199,784.16/142,365
6. Step 6: Final answer
   x = 108,588.49