Finding the Fourth Proportional to 142,116.22, 196,121.01 and 78,454.54

Step by Step Solution

1. Step 1: Write the proportion equation
   142,116.22 : 196,121.01 = 78,454.54 : x
2. Step 2: Convert to fraction form
   142,116.22/196,121.01 = 78,454.54/x
3. Step 3: Cross multiply
   142,116.22x = 196,121.01 × 78,454.54
4. Step 4: Simplify right side
   142,116.22x = 15,386,583,623.89
5. Step 5: Solve for x
   x = 15,386,583,623.89/142,116.22
6. Step 6: Final answer
   x = 108,267.61