Finding the Fourth Proportional to 142,604.66, 196,796.76 and 78,072.82

Step by Step Solution

1. Step 1: Write the proportion equation
   142,604.66 : 196,796.76 = 78,072.82 : x
2. Step 2: Convert to fraction form
   142,604.66/196,796.76 = 78,072.82/x
3. Step 3: Cross multiply
   142,604.66x = 196,796.76 × 78,072.82
4. Step 4: Simplify right side
   142,604.66x = 15,364,478,558.83
5. Step 5: Solve for x
   x = 15,364,478,558.83/142,604.66
6. Step 6: Final answer
   x = 107,741.77