Finding the Fourth Proportional to 142,180.84, 196,208.89 and 78,518.35

Step by Step Solution

1. Step 1: Write the proportion equation
   142,180.84 : 196,208.89 = 78,518.35 : x
2. Step 2: Convert to fraction form
   142,180.84/196,208.89 = 78,518.35/x
3. Step 3: Cross multiply
   142,180.84x = 196,208.89 × 78,518.35
4. Step 4: Simplify right side
   142,180.84x = 15,405,998,298.13
5. Step 5: Solve for x
   x = 15,405,998,298.13/142,180.84
6. Step 6: Final answer
   x = 108,354.95