Finding the Fourth Proportional to 142,204.32, 196,237.80 and 78,540.72

Step by Step Solution

1. Step 1: Write the proportion equation
   142,204.32 : 196,237.80 = 78,540.72 : x
2. Step 2: Convert to fraction form
   142,204.32/196,237.80 = 78,540.72/x
3. Step 3: Cross multiply
   142,204.32x = 196,237.80 × 78,540.72
4. Step 4: Simplify right side
   142,204.32x = 15,412,658,103.22
5. Step 5: Solve for x
   x = 15,412,658,103.22/142,204.32
6. Step 6: Final answer
   x = 108,383.90