Finding the Fourth Proportional to 142,097.40, 196,093.56 and 78,438.96

Step by Step Solution

1. Step 1: Write the proportion equation
   142,097.40 : 196,093.56 = 78,438.96 : x
2. Step 2: Convert to fraction form
   142,097.40/196,093.56 = 78,438.96/x
3. Step 3: Cross multiply
   142,097.40x = 196,093.56 × 78,438.96
4. Step 4: Simplify right side
   142,097.40x = 15,381,374,909.10
5. Step 5: Solve for x
   x = 15,381,374,909.10/142,097.40
6. Step 6: Final answer
   x = 108,245.29