Finding the Fourth Proportional to 142,094.16, 196,089.96 and 78,431.98

Step by Step Solution

1. Step 1: Write the proportion equation
   142,094.16 : 196,089.96 = 78,431.98 : x
2. Step 2: Convert to fraction form
   142,094.16/196,089.96 = 78,431.98/x
3. Step 3: Cross multiply
   142,094.16x = 196,089.96 × 78,431.98
4. Step 4: Simplify right side
   142,094.16x = 15,379,723,820.92
5. Step 5: Solve for x
   x = 15,379,723,820.92/142,094.16
6. Step 6: Final answer
   x = 108,236.14