Finding the Fourth Proportional to 142,100.85, 196,099.14 and 78,438.63

Step by Step Solution

1. Step 1: Write the proportion equation
   142,100.85 : 196,099.14 = 78,438.63 : x
2. Step 2: Convert to fraction form
   142,100.85/196,099.14 = 78,438.63/x
3. Step 3: Cross multiply
   142,100.85x = 196,099.14 × 78,438.63
4. Step 4: Simplify right side
   142,100.85x = 15,381,747,885.78
5. Step 5: Solve for x
   x = 15,381,747,885.78/142,100.85
6. Step 6: Final answer
   x = 108,245.29