Finding the Fourth Proportional to 142,608.98, 196,802.72 and 78,077.14

Step by Step Solution

1. Step 1: Write the proportion equation
   142,608.98 : 196,802.72 = 78,077.14 : x
2. Step 2: Convert to fraction form
   142,608.98/196,802.72 = 78,077.14/x
3. Step 3: Cross multiply
   142,608.98x = 196,802.72 × 78,077.14
4. Step 4: Simplify right side
   142,608.98x = 15,365,793,521.82
5. Step 5: Solve for x
   x = 15,365,793,521.82/142,608.98
6. Step 6: Final answer
   x = 107,747.73