Finding the Fourth Proportional to 142,084.62, 196,062.82 and 78,418.32

Step by Step Solution

1. Step 1: Write the proportion equation
   142,084.62 : 196,062.82 = 78,418.32 : x
2. Step 2: Convert to fraction form
   142,084.62/196,062.82 = 78,418.32/x
3. Step 3: Cross multiply
   142,084.62x = 196,062.82 × 78,418.32
4. Step 4: Simplify right side
   142,084.62x = 15,374,916,958.86
5. Step 5: Solve for x
   x = 15,374,916,958.86/142,084.62
6. Step 6: Final answer
   x = 108,209.58