Finding the Fourth Proportional to 142,406.54, 196,492.55 and 78,732.03

Step by Step Solution

1. Step 1: Write the proportion equation
   142,406.54 : 196,492.55 = 78,732.03 : x
2. Step 2: Convert to fraction form
   142,406.54/196,492.55 = 78,732.03/x
3. Step 3: Cross multiply
   142,406.54x = 196,492.55 × 78,732.03
4. Step 4: Simplify right side
   142,406.54x = 15,470,256,947.72
5. Step 5: Solve for x
   x = 15,470,256,947.72/142,406.54
6. Step 6: Final answer
   x = 108,634.46