Finding the Fourth Proportional to 142,608.29, 196,801.77 and 78,076.45

Step by Step Solution

1. Step 1: Write the proportion equation
   142,608.29 : 196,801.77 = 78,076.45 : x
2. Step 2: Convert to fraction form
   142,608.29/196,801.77 = 78,076.45/x
3. Step 3: Cross multiply
   142,608.29x = 196,801.77 × 78,076.45
4. Step 4: Simplify right side
   142,608.29x = 15,365,583,555.32
5. Step 5: Solve for x
   x = 15,365,583,555.32/142,608.29
6. Step 6: Final answer
   x = 107,746.78