Finding the Fourth Proportional to 142,141.76, 196,154.31 and 78,480.01

Step by Step Solution

1. Step 1: Write the proportion equation
   142,141.76 : 196,154.31 = 78,480.01 : x
2. Step 2: Convert to fraction form
   142,141.76/196,154.31 = 78,480.01/x
3. Step 3: Cross multiply
   142,141.76x = 196,154.31 × 78,480.01
4. Step 4: Simplify right side
   142,141.76x = 15,394,191,817.94
5. Step 5: Solve for x
   x = 15,394,191,817.94/142,141.76
6. Step 6: Final answer
   x = 108,301.68