Finding the Fourth Proportional to 142,635.33, 196,838.10 and 78,974.49

Step by Step Solution

1. Step 1: Write the proportion equation
   142,635.33 : 196,838.10 = 78,974.49 : x
2. Step 2: Convert to fraction form
   142,635.33/196,838.10 = 78,974.49/x
3. Step 3: Cross multiply
   142,635.33x = 196,838.10 × 78,974.49
4. Step 4: Simplify right side
   142,635.33x = 15,545,189,298.21
5. Step 5: Solve for x
   x = 15,545,189,298.21/142,635.33
6. Step 6: Final answer
   x = 108,985.55