Finding the Fourth Proportional to 142,552.96, 196,729.25 and 78,890.77

Step by Step Solution

1. Step 1: Write the proportion equation
   142,552.96 : 196,729.25 = 78,890.77 : x
2. Step 2: Convert to fraction form
   142,552.96/196,729.25 = 78,890.77/x
3. Step 3: Cross multiply
   142,552.96x = 196,729.25 × 78,890.77
4. Step 4: Simplify right side
   142,552.96x = 15,520,122,014.02
5. Step 5: Solve for x
   x = 15,520,122,014.02/142,552.96
6. Step 6: Final answer
   x = 108,872.67